A 2,400-kilogram car is traveling at a speed of 20. meters per second. compared to the magnitude of the force required to stop the car in 12 seconds, the magnitude of the force required to stop the car in 6.0 seconds is

Explanation:

u=0

s=90km/h

t=8s

a=?

But we need to convert 90km/h to m/s

36km/h=10m/s

=36/90=10/x

36x=900

x=900/36

x=25m/s

Formula.... S=ut+1/2at×t

25=0×8+1/2×a×8×8

25=a/2×64

25=64a/2

50=64a

a=50/64

a=0.78125m/s

Answer:

The law of the conservation of mechanical energy states that the total mechanical energy of a closed system remains constant, unless there is work done by non-conservative forces or heat transfer to or from the system.

In other words, the law states that the sum of the kinetic energy (energy of motion) and potential energy (energy due to position) of a system remains constant as long as there are no non-conservative forces acting on the system. Non-conservative forces are forces that dissipate energy, such as friction and air resistance. If these forces are present, they will convert some of the mechanical energy of the system into other forms of energy, such as heat or sound.

For example, if you lift a book off the ground, you are doing work on the book, which increases its potential energy. At the same time, the kinetic energy of the book decreases, because it is not moving. If you then release the book, it will fall to the ground, converting its potential energy back into kinetic energy. If there are no non-conservative forces present, the sum of the kinetic energy and potential energy of the book will remain constant throughout this process. This is an example of the conservation of mechanical energy in action.

The law of the conservation of mechanical energy states that the total mechanical energy of an isolated system remains constant, unless external forces are present. This means that the sum of the kinetic energy and potential energy within the system will remain constant over time, unless the system is subjected to external forces such as friction or gravity. This law is based on the principle that energy cannot be created or destroyed, but rather it can only be transferred or transformed. Therefore, any changes in the mechanical energy of a system must be due to the transfer or transformation of energy from one form to another, rather than the creation or destruction of energy itself.

When the speed and time is given then the distance travelled by the bus is calculated as 20 miles.

Speed distance time is the formula that is commonly used to explain the relationship between speed, distance and time. We write, speed = distance ÷ time. If you know two of the inputs then you can work out the third one.

Given, speed= 40 miles per hour ; time= 30 minutes= 0.5 hour

As distance is speed ˣ time

= 40 ˣ 0.5

So distance = 20 miles

Hence, we get the distance travelled by the bus is 20 miles.

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Moving a magnet against stronger magnetic force transfers more energy to magnetic field : true .

Moving an object against stronger magnetic force transfers more energy to the magnetic field and magnetic forces are stronger closer to the magnets. The potential energy of the system is increased because, now it has an extra force to expel the magnet.

If a magnet is moved against the magnetic force of a stronger magnet, then the motion will make the magnetic field lines to be compressed and this would cause an increase in potential energy as the magnetic force lines will now be compressed.

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The downward velocity of the pendulum is 2.8 m/s

The downward velocity of the pendulum can be found using the formula:

v = √(2gh)

where v is the velocity, g is the gravitational field strength (9.8 N/kg), h is the height (40 cm), and √ is the square root.

Converting the height to meters and plugging in the values we get:

v = √(2 * 9.8 * 0.4) = √(7.84) = 2.8 m/s

Therefore, the downward velocity of the pendulum is 2.8 m/s.

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Answer:

false. its called conflict

It is moving under the action of gravity such that a g. Using the equation of kinematics as:

v² - u² = 2gs

v = √2gs

v = √2 × 9.8 x 4.9

v = 9.8 m/s

Velocity, quantity that designates how fast and in what direction a point is moving. A point always moves in a direction that is tangent to its path; for a circular path, for example, its direction at any instant is perpendicular to a line from the point to the centre of the circle (a radius). The magnitude of the velocity (i.e., the speed) is the time rate at which the point is moving along its path.

If a point moves a certain distance along its path in a given time interval, its average speed during the interval is equal to the distance moved divided by the time taken. A train that travels 100 km in 2 hours, for example, has an average speed of 50 km per hour.

During the two-hour interval, the speed of the train in the previous example may have varied considerably around the average. The speed of a point at any instant may be approximated by finding the average speed for a short time interval including the instant in question. The differential calculus, which was invented by Isaac Newton for this specific purpose, provides means for determining exact values of the instantaneous velocity.

Because it has direction as well as magnitude, velocity is known as a vector quantity and cannot be specified completely by a number, as can be done with time or length, which are scalar quantities. Like all vectors, velocity is represented graphically by a directed line segment (arrow) the length of which is proportional to its magnitude.

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A man walks for some time 't' with velocity(v) due east. Then he walks for same time 't' with velocity (v) due north. The average velocity of the man is v/√2 meter per seconds. Thus, the correct option is D.

Velocity can be defined as the direction of the movement of the body or an object. Velocity is essentially a vector quantity because it has both the direction and magnitude. It is the rate of change of displacement.

Displacement, S = OB = [tex]\sqrt{(OA)^{2}+ (AB)^{2}}[/tex]

S = [tex]\sqrt{(vt)^{2} + (vt)^{2} }[/tex]

S = [tex]\sqrt{2}[/tex]vt m/s

Total time, T = 2t

Average velocity, Vavg = S/T

Vavg = [tex]\sqrt{2}[/tex]vt/2t

Vavg = v/[tex]\sqrt{2}[/tex]m/s

Therefore, the Vavg of the man is v/√2m/s.

Therefore, the correct option is D.

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Your question is incomplete, most probably the complete question is:

A man walks for some time 't' with velocity(v) due east. Then he walks for same time 't' with velocity (v) due north. The average velocity of the man is

A. 2v

B. √2 v

C. v

D. v/√2

The light emanating from galaxies behind it is bent or distorted by it.

When a massive mass of matter, such as a group of galaxies, produces a gravitational field that bends and magnifies light from distant galaxies that are in front of it but in the same line of sight, the result can be a gravitational lens.

It has the same effect as gazing through a very large magnifying lens. Astronomers can gain more insight into the mass and dark matter content of the foreground galaxies thanks to the gravitational lensing theory. As implied by the name, dark matter is dark. Astronomers can only study it by seeing how its gravity affects things that are visible to us.

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The process by which plastic deformation is produced by dislocation motion is called slip deformation.

When applied stress exceeds the elastic limit or yield stress, the deformation of the material body occurs. This is due to the result of a slip or dislocation mechanism at the atomic level. Plastic deformation in a metal has two prominent mechanisms, and they are. When we apply a shear stress on an object in a particular direction to change its shape or anything that we cam do. the shear stress generate a strain on the object and changes its shape to the extent that we can do by the force. the shape is changed to the extent by the force applied on the part of it and we can take a look into it. A prominent mechanism of deformation in metal is slip. By this particular information we can firmly conclude that the process by which plastic deformation is produced by dislocation motion is called slip deformation.  

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The magnitude of the acceleration of the car from the recorded the following data for the motion of a car undergoing constant acceleration is 2 m/s².

Acceleration is the term used to describe the rate of change in velocity.

Acceleration a = (V f - V₀)/ (t f - t₀)

where, V f is the final velocity

V₀ is the initial velocity

t f is the final time

t₀ is the initial time

Using the first two rows of the table in the attachment, we have,

a = (6 - 4)/(4 - 3) = 2/1 = 2 m/s²

Thus, the required magnitude of the acceleration of the car from the recorded the following data for the motion of a car undergoing constant acceleration is 2 m/s².

The given question is incomplete. The complete question is given in the attachment below.

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Saltation refers to the "bouncing" mode of sand transport in a windstorm or stream. Hence, the option A. Saltation is correct.

Sand can be moved by currents that are driven by gravity, wind, waves, tides, and density (current-related transport), by waves that oscillate as a result of short waves being bent under the impact of depth-decreasing water (wave asymmetry), or by a combination of currents and waves.

Because larger particles are too heavy for the wind to suspend, particles are sand-sized. The wind picks up speed as it climbs and crosses the obstruction. By saltation, it moves the sand grains up the dune's slightly sloping upwind side. The wind's velocity drops as it crosses the dunes.

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Atmospheric perspective the effect is produced by diffusion of light in the аtmosphere whereby more distаnt objects hаve less clаrity of outline аnd аre lighter in tone.

Atmospheric perspective is mаking objects thаt аre further аwаy less detаiled. Аtmospheric perspective cаn be regаrded аs the effect of the аtmosphere on the аppeаrаnce of objects when it is been viewed by аn observer from а distаnce.

It cаn be seen аs аn effect аs а result of diffusion of light in the аtmosphere, in this cаse object thаt аre аt distаnce do hаve less clаrity of outline аs well аs lighter in tone.

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If Lee pushes horizontally with a force of 78N on a 29kg mass for 16m across a floor. The amount of work Lee did is: 1,248J.

Given data:

Mass of the object , m = 29kg

Force, F = 78N

Displacement, d = 16m

Now let find the amount of work using this formula

Work = F × dcosθ

Let plug in the formula

Work = 78 × 16cosθ

Work = 1,248J

Therefore we can conclude that the work done is 1,248J.

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The force Jane push on Mary is 10N. And the acceleration of mary is 1.82m/s² and acceleration for Jane is 2.86m/s²

Newton third law of motion states that If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. It can also be defined as , action and reaction are equal but opposite in direction.

For example if a man of weight 100N sits on a bench, the force the bench will have on the man is also 100N.

Similarly, if Mary pushes Jane with a force 10N, therefore Jane will also push Mary with a force 10N in the opposite direction.

From F = ma

the acceleration of mary = F/m

= 10/5.5 = 1.82m/s²

the acceleration of Jane =F/m

= 10/3.5 = 2.86m/s²

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Impulse is equal to the change in momentum of an object. The momentum of an object is equal to its mass times its velocity.

The initial momentum of the dog is 80kg * 2m/s = 160kg*m/s.

The final momentum of the dog is 80kg * 3m/s = 240kg*m/s.

The change in momentum of the dog is 240kgm/s - 160kgm/s = 80kg*m/s.

Therefore, the impulse on the dog is 80kg*m/s.

The wavelength of a photon whose frequency is specified is calculated to be 1 m.

We know the relation between frequency, wavelength and speed of light as,

ν = c / λ

where,

c is the peed of light in m/s

λ is wavelength in m

ν is frequency in hz

Given that,

Frequency ν = 300 million hertz = 300 × 10⁶ hz

To find wavelength, let us make wavelength as subject,

λ = c / ν = (3 × 10⁸)/(300 × 10⁶) = 1 m

Thus, the wavelength of a photon whose frequency is specified is calculated to be 1 m.

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Their speed will be  half the initial speed of car A.

The speed of an item, which is a scalar quantity, is the size of the change in its location over time or the size of the change in its position per unit of time.

Any situation in which two or more objects exert forces on one another quickly is referred to as a collision. The scientific definition of the word "collision" makes no reference to the magnitude of the force involved, despite the fact that the most frequent usage of the word relates to instances in which two or more objects clash violently.

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A working-class clockmaker from Yorkshire named John Harrison developed a device that could tell the correct time at sea in order to overcome the longitude problem.

While it is reasonably simple to measure latitude accurately enough for seafaring, it is far more challenging to determine longitude precisely. The English Parliament had offered a cash prize of up to 20,000 pounds in 1714 for a workable solution to the length issue. The prize money was scaled based on how accurately the method was presented. John Harrison didn't start researching this subject until ten years after the prize money was published, but he would continue to do so right up until the end of his life. Astronomical navigation hasn't yielded any workable solutions up until now. The Board of Longitude was established to judge the proposals offered and handle prize administration.

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Trough is a linear zone of lower pressure between two areas of high pressure.

An extended area of moderately low atmospheric pressure known as a trough lacks a closed isobaric contour that would classify it as a low pressure area. Troughs and ridges refer to features in the same sense as those on a topographic map since low pressure suggests a low height on a pressure surface.

Troughs could be overhead or close to the ground. A weather front that is accompanied by clouds, showers, and a change in wind direction is occasionally marked by near-surface troughs. The jet stream's upper-level troughs (as depicted in the diagram) are caused by cyclonic filaments of vorticity. Their movement causes upper-level wind divergence, which helps to produce overcast and rainy weather there by elevating and chilling the air ahead of (downstream) the trough.

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The electromagnetic energy that is produced when a projectile electron slams into a metal target is called bremsstrahlung radiation.

This radiation is produced when an accelerated charged particle, such as an electron, is decelerated by the Coulomb force of an atomic nucleus. As the electron slows down, it emits electromagnetic radiation in the form of X-rays or gamma rays. The intensity and frequency of the bremsstrahlung radiation depends on the energy of the incident electron and the atomic number of the target material. Bremsstrahlung radiation is a continuous spectrum of electromagnetic radiation, meaning that it consists of a range of frequencies rather than a single frequency.

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The electromagnetic energy that is produced when a projectile electron slams into a metal target is called bremsstrahlung radiation.

When a projectile electron slams into a metal target, the kinetic energy of the electron is transformed into electromagnetic energy. The electromagnetic energy is called bremsstrahlung radiation. This radiation is produced when an accelerated charged particle, such as an electron, is decelerated by the Coulomb force of an atomic nucleus. As the electron slows down, it emits electromagnetic radiation in the form of X-rays or gamma rays. The intensity and frequency of the bremsstrahlung radiation depends on the energy of the incident electron and the atomic number of the target material. Bremsstrahlung radiation is a continuous spectrum of electromagnetic radiation, meaning that it consists of a range of frequencies rather than a single frequency. It is produced when an electron is moving at a high speed and it is moving just in an company to be as fast as they can. in the process they lose energy in a constant phase.

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The final velocity of the object after the collision is  -12 kg*m/s. This is an inelastic collision because some kinetic energy is lost during the collision.

An inelastic collision occurs when there is a loss of kinetic energy. While the system's momentum is conserved in an inelastic collision, kinetic energy is not. This is due to the transfer of some kinetic energy to something else.

The total momentum before the collision is (4.0 kg)(10m/s) + (1.0 kg)(5.0 m/s) = 45 kg*m/s.

The total momentum after the collision is (1.0 kg)(v) + (4.0 kg)(8.0 m/s) = 0

where v is the speed of the 1.0 kg object after the collision.

Solving for v, we find that v = -12 kg*m/s                                          

Therefore, the speed of the 1.0 kg object after the collision is  -12 kg*m/s .

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the answer is definitely 25. no cap

Explanation:

facts

Based on the information provided, the lighter object is further away from the fulcrum than the heavier object.

In physics and mechanics, torque refers to the rotational equivalent of linear force and also referred to as the moment of force. It represents the capability of a force to produce change in the rotational motion of the body. The moment of inertia of a rigid body refers to a quantity that determines the torque needed for a desired angular acceleration about a rotational axis. Hence, based on these concepts, on a seesaw, the torque of each child about the pivot point is the product of the child's weight and the distance of the child from the pivot or fulcrum. In an experiment, in order to produce equal torque on either side of the fulcrum, lighter object is further away from the fulcrum than the heavier object.

Note: The question is incomplete. The complete question probably is: Gizmo shows a see-saw, which is a type of lever. The mass of object A is 1.0 kg and the mass of object B is 2.0 kg. Experiment with the Gizmo shows how you can balance a heavy object with a light object. What is said about the distances of each object from the fulcrum.

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According to Newton's Third Law, the ball and the ground act on each other with equal and opposite forces. When the ball strikes the ground, the ground exerts an upward force on the ball, while the ball exerts an equal and opposite downward force on the ground. This is why the ball bounces off the ground.

Newton's Third Law states that for every action, there is an equal and opposite reaction. This law is often referred to as the law of action and reaction, and it applies to all physical interactions, from the motion of a rocket to the bouncing of a ball. In simplest terms, this law states that when two objects interact, they apply forces to each other of equal magnitude and opposite direction. This means that if object A exerts a force on object B, object B will exert an equal and opposite force on object A.

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Q = mL, which is the necessary specific latent heat of the fusion equation, is the formula for the specific latent heat of fusion.

Consequently, we can state that a material's particular latent heat (L) is: The quantity (Q) of heat energy that is released or absorbed per mass (m) during a phase shift is measured. It is described by the equation Q = mL.

Ice melts at a constant temperature of 0 °C (32 °F), and the liquid water that is created by the latent heat of fusion is also at this temperature. At 0 °C, the heat of fusion for water is equivalent to 334 joules (79.7 calories).

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The formula for the specific latent heat of fusion is Q = mL, where Q is the required specific latent heat of the fusion equation.

The quantity (Q) of heat energy that is emitted or absorbed per mass (m) during a phase shift is measured, and this is how we may define a material's specific latent heat (L): It can be explained using the formula Q = mL. Ice melts and the liquid water produced by the latent heat of fusion both occur at a constant temperature of 0 °C (32 °F). The heat of fusion for water at absolute zero is 334 joules (79.7 calories). The formula for the specific latent heat of fusion is Q = mL, where Q is the required specific latent heat of the fusion equation.

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Nature and nurture both play a role in how people develop. Nature refers to the genetic or inherited traits we are born with, and nurture refers to the environment and experiences that shape us as we grow up. Together, these two components make up the basis for human development.

Let x, y, z, and w be the number of units of products i, ii, iii, and iv, respectively, produced each week.

Maximize 360x + 240y + 360z + 480w

Subject to:

x + y + z = 150 (contractual obligation)

w ≤ 25 (maximum of 25 units of product iv)

x ≤ 480 (available machining time)

y ≤ 400 (available polishing time)

z ≤ 400 (available assembling time)

x, y, z, w ≥ 0 (non-negativity)

The optimal solution is x = 150, y = 0, z = 0, and w = 25, which yields a maximum profit of 90,000 birr.

After the collision, the kinetic energy of the system is 2/5Mv^2 when a massless rigid rod is pivoted at one end, and a mass M is at the other end collides with another mass M at its midpoint and rotates together.

Given the mass of block is M

The rod rotates about the pivot with a uniform angular velocity.

speed of block = v

The rotating rod collides with another mass M at its midpoint.

The the rod rotates with extra mass M with a total of 2M.

In the collision, angular momentum around the pivot is conserved. Let M's initial mass's final speed be v1. The second mass's final speed is then equal to v1/2. Keeping the starting and ending angular momentum equal we say, Mvr = Mv1r + M(v1/2)(r/2)

v1 = 4/5v

The final kinetic energy is 1/2M(v1)^2 + 1/2M(v1/2)^2 =2/5Mv^2

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The restoring force of a spring is 19.25 Newtons

To get the restoring force, we can make use of the formula that is as follows:

F = -k x

When F represents the restoring force, x represents the displacement from equilibrium caused by the deformation, and k represents the constant that is connected to how difficult it is to distort the system, the expression reads as follows. While the minus sign denotes that the restoring force acts in the opposite direction to the displacement, the displacement itself remains constant. Using the formula, we get the following: 55 Newtons per meter multiplied by 0.35 meters.

Therefore, 19.25 Newtons would constitute the restoring force.

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