Answer:
10,100 N
Explanation:
m - 1 ton = 1,000 kg
v₀ = 40 m/s, v = 0
d = 80 m
f = 100 N
Net force = F + f = ma
v² - v₀² = 2ad, so a = (v² - v₀²)/(2d) = (0 - 40²)/(2*80) = -10 m/s²
F = ma - f = 1,000*(-10) - 100 = -10,100 N
negative sign means opposite to the driving direction
Jennifer is walking at 1.63 m\s. If Jennifer weighs 583 N, what is the magnitude of her momentum?
Given that Jennifer is walking at 1.63 m/s and her weight is 583 N. Therefore, the magnitude of her momentum is 96.97 Kg•m/s
How to determine Jennifer's mass Weight (W) = 583 NAcceleration due to gravity (g) = 9.8 m/s²Mass (m) =?
m = W / g
m = 583 / 9.8
m = 59.49 Kg
How to determine Jennifer's momentum Mass = 59.49 KgVelocity = 1.63 m/sMomentum =?Momentum = mass × velocity
Momentum = 59.49 × 1.63
Momentum = 96.97 Kg•m/s
Learn more about momentum:
https://brainly.com/question/250648
Brainliest if correct Question 7 of 10
When a boy jumps on his bed, his feet push the bed down. What is the
reaction force?
A. The bed pushes his feet up.
B. His gravity pulls up on the bed
C. His gravity pulls up on Earth.
D. The bed pushes down on the ground
SUBMIT
You will need these materials:
1 compass (available wherever science lab supplies, educational science materials, or party supplies are sold)
1 bar magnet (must be strong enough to move the compass)
2 pieces of white paper, partially overlapped and taped together to make an 11-inch square
pen or pencil
Stay safe! Keep the magnet away from all electronic devices, including cell phones and computers. Do not carry out this activity if you have an implanted device that contains metal.
Part A
Bring the compass and the magnet near one another. Verify that they are both magnetic and interact with each other. Like poles should repel, and unlike poles should attract.
Answer:
sorry really need points thanks tho
An object has a mass of 785g and a volume of 15cm cubed. What is its density
Answer:
52.33 repeating
Explanation:
Density is equal to the Mass of an object divided by its Volume. or p = m/V
3. In what circumstance will a flash of lightning travel through the sky and
touch the ground?
Answer: The answer is both. Cloud-to-ground lightning comes from the sky down, but the part you see comes from the ground up. A typical cloud-to-ground flash lowers a path of negative electricity (that we cannot see) towards the ground in a series of spurts.
Explanation:
How much force is needed to stretch a spring 1.2m if the spring constant is 8.5 N/m?
Explanation:
spring constant k::8.5
and displacement x::1.2
f:? f: k×x
8.5×1.2:10.2N
When work is done by the force of gravity, the path that the object takes isn't important. What matters
is the object's change in height, regardless of the path taken to get there. We have already discussed
that when there is a net force on an object, it's kinetic energy changes. We can see that in the
previous example of the brick falling towards the Earth over a distance h. As it falls the net force on it
is F,-mg, and it gains kinetic energy as it falls. Let's consider what must happen before the brick
falls. If the brick starts on the ground, let's assume that someone has to lift it up a distance h before it
falls.
10) If you lift a brick (mass m) up a distance h, what is the minimum force you need to apply to the
brick to lift it up?
11) If you apply that much force to the brick, how much work does your force do on the brick over the
distance h?
12) While lifting the brick, what is the net force acting on the brick?
13) While you are lifting up the brick, the net force on it is zero. Therefore, the net work done on the
brick is zero, and its kinetic energy remains the same. However, your force is still doing work on
the brick. If it's not causing a gain of kinetic energy then what is that work doing?
Answer:
Explanation:
10) mg
11) mgh
12) 0
13) Increasing potential energy
how to how to how to how
Answer:
Not sure what how to how to how to how means but if you tell me what you need id be happy to help
6 J of work is needed to stretch a spring from 10 cm to 12 cm and another 10 J is needed to stretch it from 12 cm to 14 cm, what is the natural length of the spring (in centimeters)
Answer:
9.8 cm
Explanation:
x = natural length
k*[(12 - x)² - (10 - x)²]/2 = 6 (1)
k*[(14 - x)² - (12 - x)²]/2 = 6 + 10 (2)
(1): k(144 + x² - 24x - 100 - x² + 20x) = 12
k(44 - 4x) = 12,
divide by 4, k(11 - x) = 3, k = 3/(11 - x)
(2): k(196 + x² - 28x - 144 - x² + 24x) = 32
k(52 - 4x) = 32
divide by 4, k(13 - x) = 8
3/(11 - x) * (13 - x) = 8
3(13 - x) = 8(11 - x)
39 - 3x = 88 - 8x
5x = 49
x = 9.8 cm
Eva Baul throws a ball upward at 23.4 m/s
Answer:
28 m
Explanation:
v₀ = 23.4 m/s, g = -9.8 m/s²
at the peak v = 0
find h
v² - v₀² = 2gh
0 - 23.4² = 2(-9.8)h = -19.6 h
so h = 28 m
in vision, the ____ stream controls identification of an object, and the ____ stream controls action toward the object.
Answer: In vision, the ventral stream controls identification of an object, and the dorsal stream controls action toward the object.
Explanation: The ventral stream is associated with object recognition and form representation.
Dorsal stream a pathway that carries visual information from the primary visual cortex to the parietal lobe.
Hope it helps :)
21. A box is at rest at the top of a frictionless inclined plane. As the box slides down the ramp where along the ramp would the box have half of its orginial potential energy?
Halfway down the ramp
When it is at half of its maximum velocity
When it is at half of its total trip time
Answer:
21. A box is at rest at the top of a frictionless inclined plane. As the box slides down the ramp where along the ramp would the box have half of its orginial potential energy?
Halfway down the ramp
When it is at half of its maximum velocity
When it is at half of its total trip time
help pls someone quick
Answer:
Correct
Explanation:
The logs and the slope helped the men to lift the nearby stone.
A motivated mule can accelerate an empty cart of mass m - 180 kg from rest to 5.0 m/s in 10 s.
If the cart is loaded with 550 kg of wood, how long will it take the mule to get the cart to 4.6 m/s? Assume a constant acceleration. Also assume the mule exerts the same force as when the cart is
empty
When the mass of the cart changes, the time to travel at 4.6 m/s is 28.11 s.
Acceleration of the mule
The acceleration of mule is calculated as follows;
a = v/t
a = 5/10
a = 0.5 m/s²
For constant applied forceF1 = F2
m₁v₁/t₁ = m₂v₂/t₂
(180 x 5) / 10 = (550 x 4.6)/t
90 = 2530/t
t = 2530/90
t = 28.11 s
Thus, when the mass of the cart changes, the time to travel at 4.6 m/s is 28.11 s.
Learn more about acceleration here: https://brainly.com/question/14344386
What is the relationship between frequency, wave length, and speed of a wave?
Answer:
Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.
Answer:
v = νλ
Explanation:
Let these be the denoted symbols for the values :-
Frequency = ν
Wavelength = λ
Speed = v
=> Then the relation is :
=> v = νλ
Help me pls, the lesson is simple machines
Answer:
1.pulley,screw,inclined plane
2.using simple machine properly with right way and precautions
Explanation:
3.cuz if they are not used properly they can cause injuries to organs
The first user who answer is correct :)
What is one limitation of using renewable
resources for electrical energy?
A. The output of energy they produce is not always consistent.
B. They can be easily replaced.
C. They produce less pollution.
D. They produce a large amount of energy.
A superelastic collision is one in which...
A. kinetic energy before the collision equals kinetic energy after the collision.
B. kinetic energy after the collision is zero.
C. kinetic energy before the collision is less than kinetic energy after the collision.
D. kinetic energy before the collision is greater than kinetic energy after the collision.
Answer: ~Y/n here~ Your answer I believe would be:
A. kinetic energy before the collision equals kinetic energy after the collision.
(Hope this helps!)
What combination do I need to use for this egg to survive a 5 meter drop?
Answer:
lunch box, cotton, toilet paper, and the foam peanuts
Explanation:
bc I did this experiment in 3rd grade =w="
Hope this helped! Have a nice day!
Please give brainliest when possible!
:3
When a wire is heated, the current goes down from 0.3A to 0.26A. State how the resistance of the wire has changed
It's very wonderful to help you today!
Answer:
The resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.
Explanation:
The resistance of the wire goes up as the temperature goes up.
By Ohm's law, we have the relationship between the resistance of a conductor R, the current flowing through it, I, and the voltage across it, V,
[tex]V=R~x~I[/tex]
As described, the current through the wire decreases so, to maintain the same voltage, the resistance must increase when the wire is heated. Let's say R1 is the resistance before heating the wire and R2 is the resistance after,
[tex]V=R_{1} x~I_{1} =R_{2}~} x~I_{2}[/tex]
Let's solve for R2,
[tex]R_{2} =\frac{I_{1} }{I_{2} }~x~R_{1}[/tex]
In this case, I1 = 0.3A and I2 = 0.26A,
[tex]R_{2} =\frac{0.3A}{0.26A} ~x~R_{1} =1.15R_{1}[/tex]
Hence, the resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.
How does work affect energy between objects so it can cause a change in the form of energy?
O Work transfers energy.
O Work changes energy.
O Work increases energy.
O Work decreases energy.
Answer:
Work transfers energy
Explanation:
Work can affect energy by transfering energy between objects to result to a change in the amount and form of energy
Earth what on its axis from what to what approximately every what
Could someone help me
What means what should I put in there
Answer:
Earth rotates on its axis from west to east approximately every 24 hours
Explanation:
hope this helps :)
Four metals were kept in contact with each other. The table below shows the initial temperature of the metals.
Metal Initial temperature
A. 30 degrees Celsius
B. 42 degrees Celsius
C. 25 degrees Celsius
D. 16 degrees Celsius
From which metal will heat flow into all the other metals?
O Metal A
O Metal B
O Metal C
O Metal D
Answer:
metal B
temperature flow from high region to low . metal B has more temperature than others
Gauss's law combines the electric field over a surface with the area of the surface. From Coulomb's law we know that the electric field falls off as 1/r2 of the distance r from the charge. How does the surface area change with r ?
The change in surface area of Gaussian surface with radius (r) is 8πr.
Electric field from Coulomb's lawThe electric field experienced by a charge is calculated as follows;
[tex]E = \frac{Q}{4\pi \varepsilon_o r^2}[/tex]
where;
E is the electric fieldQ is the charger is the radiusThe electric field reduces by a factor of [tex]\frac{1}{r^2}[/tex]
Surface area of a Gaussian surface;The surface area of a sphere is given as;
[tex]A = 4\pi r^2[/tex]
Change in area with r[tex]\frac{dA}{dr} = 8\pi r[/tex]
Thus, the change in surface area of Gaussian surface with radius (r) is 8πr.
Learn more about area of Gaussian surfaces here: https://brainly.com/question/17060446
What is the operating life time of a PV Module?
Answer:
The industry standard life span is about 25 to 30 years, and that means that some panels installed at the early end of the current boom aren't long from being retired is the operating life time of a PV module .
 State how a ray of light can travel from air into glass without bending?
Answer:
If you shine a beam of light (a bundle of parallel rays) through the air, it will travel in a straight line. Rays of light usually travel in straight lines until they hit something. If a ray of light hits the surface of a sheet of glass, some light will be reflected by the surface of the glass.
Explanation:
STREAM LALISA AND MONEY
How does light from a headlamp use a lens and a mirror to produce a narrow beam?
Answer:
AnSwEr iS BeLoW
Explanation:
Well according to https://van.physics.
The headlamp's concave mirror is open on one end, and the light bulb's filament is placed at or near the focus. Parallel ight rays, if they were coming into the headlamp from outside (say, the driver is driving his car in the direction of the setting sun), would converge near the filament of the light bulb
Hopes this helps :)
When a light bulb is placed at focus , the head lamp as a concave mirror will produce a narrow beam.
What is concave mirror?Concave mirror is the spherical part of mirror which is painted from outside and the ray falling on this mirror forms a real image.
The concave mirror of headlamp is open on one end, and the bulb filament is placed at the focus. Parallel ight rays from outside will converge to form a narrow beam near the filament of the light bulb.
Thus, When a light bulb is placed at focus , the head lamp as a concave mirror will produce a narrow beam.
Learn more about concave mirror.
https://brainly.com/question/3555871
#SPJ2
005 10.0 points
A football punter accelerates a 0.52 kg football
from rest to a speed of 8.6 m/s in 0.27 s. What
constant force does the punter exert on the ball?
Answer in units of N.
Answer:
16.6 N
Explanation:
m = 0.52 kg, v₀ = 0, v = 8.6 m/s, t = 0.27 s
a = (v - v₀)/t
F = ma = m(v - v₀)/t = 0.52 (8.6 - 0)/0.27 = 16.6 N
Essay on Outdoor skills
Answer and Explanation:
I can't write the essay for you, but I can give you useful tips on what information should be in your essay.
____________________________________
Outdoor skills basically have a similar concept to street smarts. With street smarts, you are knowledgeable in what to do on the streets, how to act, what signs and signals to look out for, and other things like that. With outside smarts, it's the same way. Except, I would say that it is a little less social.
Outside smarts could be something like camping, and surviving in general in the wild, such as:
- Creating a tent or shelter for yourself to sleep in.
- Finding food and knowing whether it is acceptable and safe to eat.
- Making sure that you are in a safe area that is okay for you to camp out in.
- Making sure that you have some sort of protection, whether that would be with a weapon, a tool, or something else.
- Making sure that you have safe water to drink that you brought with you.
- A back-up plan in case there is a reason that you need to leave.
- A first aid kit in case of injury.
- How to create a fire and use it safely.
- A way to get back home, with a plan and possibly even a compass.
____________________________________
I hope that this helps.
what is the difference between internal and external force
Answer:External forces are forces caused by external agent outside of the system. Internal forces are forces exchanged by the objects in the system.
Explanation:or our purposes, we will simply say that external forces include the applied force, normal force, tension force, friction force, and air resistance force. And for our purposes, the internal forces include the gravity forces, magnetic force, electrical force, and spring force.HOPE THIS HELPS!!! ^w^
