HELP ME!!

Draw a force diagram of the forces acting on a person while sitting in a roller coaster
car as it accelerates up a hill. You may choose the type of restraint.

Answer:

Explanation:

force = f, mass = m, acceleration = a

f = m a

m = 200 kg

f = 800 N

f = m a

800 = 200a

a = 800 / 200

a = 4

Hope this helps

plz mark as brainliest!!!!!!!

Answer:

a)   I = 0.01029 A , b)   Q = 4074.05 J

Explanation:

a) Let's work in parts, let's start by looking for the energy consumed.

For this we use a rule of three or direct proportions if 1 kWh costs $ 0.09, how much kWh is $ 8.80

           Energy = 8.80 / 0.09

           Energy = 97,778 kWh

to calculate the current, we must have the energy consumed per second

Let's use a rule of three if 97,778 kWh were consumed in 24 h = 86,400 s how much was consumed in 1 s

            E₀ = 97.778 1/86400

            E₀ = 1.13168 Ws

the power consumed is

           P = E₀ / t

           P = 1.13168 / 1

           P = 1.13168 W

power is

           P = I V

           I = P / V

           I = 1.13168 / 110

           I = 0.01029 A

b) the heat is given by

as the efficiency is 100%

          E = P t = Q

          Q = 1.131368 3600

          Q = 4074.05 J

Answer:

5 hours

Explanation:

so if they traveled an average speed of 65 km/h then that means they traveled 130 km (2*65). Then the remaining distance to travel will be 364-130, or 234 km. If you travel at 78 km /h, then it will take you 234/78, or 3 more hours to reach Fragrance Hill. Add 2 and 3 to get a total of 5 hours

Explanation:

The electric potential energy is given by :

[tex]U=\dfrac{kq_1q_2}{r}[/tex]

k is electrostatic constant

r is the distance between charges q₁ and q₂

It is clear that the potential energy is directly proportional to the charges. It means if one particle's charge is reduced by 3, its electric potential energy is reduced by 3.

Answer:

Reduced by a factor of 3.

Explanation:

Answer:

a roller coaster car moving toward the top of a rise in the tracks

Explanation:

A roller coaster car moving toward the top of a rise in the tracks is an example of the conversion of kinetic energy into gravitational potential energy , therefore the correct answer is option C.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy .

As given in the problem we have to find out Which of these is an example of the conversion of kinetic energy into gravitational potential energy ,

A roller coaster car moving toward the top of a rise in the tracks is an example of the conversion of kinetic energy into gravitational potential energy , therefore the correct answer is option C .

To learn more about mechanical energy here , refer to the link ;

brainly.com/question/12319302

#SPJ6

Answer:

it should be 0

Explanation:

when it was thrown it should be 0 because it hasn't moved because it was just thrown

Answer: is B. Precision, accuracy

Explanation: Precision is the degree of exactness of a measurement; Accuracy describes how well the results of a measurement agree with the real value.

Brainiest Please

In the context of measurements, accuracy and precision are two different concepts that describe different aspects of the quality or reliability of the results obtained. The correct answer is A

Accuracy refers to how close the measured value is to the true or accepted value. It is a measure of how well the measurement reflects the actual quantity being measured. If a measurement is accurate, it means that it is on target and has a minimal deviation from the true value.

Precision, on the other hand, refers to the degree of exactness or consistency in the measurements. It measures the level of repeatability and reproducibility of the results. A precise measurement has very little variation or scatter between repeated measurements of the same quantity. Precision does not necessarily guarantee accuracy.

To summarize:

Accuracy relates to the closeness of a measurement to the true or accepted value.

Precision relates to the consistency and reproducibility of the results obtained.

In the given options, the correct answer is A: accuracy, precision. Accuracy describes how well the results of measurement agree with the real value, while precision is the degree of exactness of a measurement.

To know more about accuracy and precision:

https://brainly.com/question/34302810

#SPJ6

Answer:

a. 127 V b 311 V

Explanation:

a. The RMS value of E(t) = 1/T∫[E(t)]². E(t) = 180 sin(200πt). Since the frequency f = 100 cycles per second, the period, T = 1/f = 1/100 = 0.01 s.

So, 1/T∫[E(t)]² = 1/T∫[180 sin(200πt)]² = 180²/0.01∫sin(200πt)]²

Using trigonometric identity sin²Ф = (1 - cos2Ф)/2 where Ф = ωt

1/T∫[E(t)]² = 180²/0.01∫(1 - cos2Ф)/2. We integrate from 0 to T, , we have

1/T∫[E(t)]² = 180²/(0.01 × 2)(t - sin2ωt/2ω)

1/T∫[E(t)]² = 180²/(0.02[(T - (sin2π)/(2 × 200π) ) - (0 - [sin(2 × 0)]/(2 × 200π))

1/T∫[E(t)]² = 180²/(0.02)[(0.01 - 0)

1/T∫[E(t)]² = 180²/2

E(t)RMS = √1/T∫[E(t)]²

= √180²/2

= 180/√2

= 127.28 V

= 127 V to the nearest whole number

b. Since E(t)(RMS) = A/√2 where A = voltage amplitude and E(t)(RMS) = 220 V,

A = √2E(t)(RMS) =

√2 × 220 V

= 311.13 V

= 311 V to the nearest whole number

Answer:

The density is:   [tex]0.926 \,\frac{g}{cm^3}[/tex]

Explanation:

Recall that density is defined as the quotient of the object's mass divided by volume. So, we calculate the volume of the 3 cm side cube:

[tex]Vol = (3 \,cm)^3 = 27 \,\,cm^3[/tex]

then the density becomes:

[tex]density=\frac{mass}{Vol} =\frac{25}{27} \,\frac{g}{cm^3} \approx 0.926 \,\frac{g}{cm^3}[/tex]

Answer:

4 Feet

Explanation:

Because A Quarter of 16 is 4

You really can't tell. You don't know if its speed was constant for the whole second, or whether it was accelerated, decelerated, intermittent, bouncing back and forth, etc. All you know is that after 1 second, it had moved 16 ft.

IF its speed was constant AND it moved in a straight line, THEN it moved 4 ft in the first quarter of that second.

If it rolled off of a roof and FELL 16 ft in the first second, then it fell 1 foot in the first quarter second.

We can show that air is dissolved in water with the help of following activity: Take some water in a glass or metal container like pan and heat it. Just before water begins to boil, you will notice some bubbles at the inner surface of the pan. These bubbles come from the air dissolved in water.

Answer:

a) The work required to wind the entire chain onto the cylinder using the winch is 120135.75 joules, b) The work required to wind the chain plus the block is 144162.9 joules.

Explanation:

a) Let be an infinitesimal part of the long chain, whose gravitational potential energy is:

[tex]dU_{g} = g\cdot z \,\delta m[/tex]

Where:

[tex]U_{g}[/tex] - Gravitational potential energy, measured in joules.

[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.

[tex]m[/tex] - Mass of the long chain, measured in kilograms.

[tex]z[/tex] - Height of the portion of the long chain with respect to ground, measured in meters.

Since chain has an uniform linear density, this differential expression can be rewritten as:

[tex]dU_{g} = \lambda\cdot g \cdot z \, dz[/tex]

Where [tex]\lambda[/tex] is the linear density, measured in kilograms per meter.

We obtain the gravitational potential energy to wind the chain onto the cylinder by integration:

[tex]\Delta U_{g, chain} = \lambda\cdot g \int\limits^{z_{f}}_{z_{o}} {z} \, dz[/tex]

[tex]\Delta U_{g, chain} = \frac{\lambda\cdot g}{2} \cdot (z_{f}^{2}-z_{o}^{2})[/tex]

Where:

[tex]\Delta U_{g, chain}[/tex] - Gravitational potential energy of the entire chain, measured in joules.

[tex]z_{o}[/tex] - Initial height with respect to ground, measured in meters.

[tex]z_{f}[/tex] - Final height with respect to ground, measured in meters.

From the Work-Energy Theorem we get that work needed to wind the entire chain equals the gravitational potential energy of the entire chain:

[tex]W = \Delta U_{g, chain}[/tex]

[tex]W = \frac{\lambda\cdot g}{2} \cdot (z_{f}^{2}-z_{o}^{2})[/tex]

If we know that [tex]\lambda = 5\,\frac{kg}{m}[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], [tex]z_{o} = 0\,m[/tex] and [tex]z_{f} = 70\,m[/tex], the work needed is:

[tex]W = \frac{\left(5\,\frac{kg}{m} \right)\cdot \left(9.807\,\frac{m}{s^{2}} \right)}{2} \cdot [(70\,m)^{2}-(0\,m)^{2}][/tex]

[tex]W = 120135.75\,J[/tex]

The work required to wind the entire chain onto the cylinder using the winch is 120135.75 joules.

b) The gravitational potential energy of the block, measured in joules, is:

[tex]\Delta U_{g,block} = m_{block}\cdot g \cdot (z_{f}-z_{o})[/tex]

Where:

[tex]m_{block}[/tex] - Mass of the block, measured in kilograms.

[tex]z_{o}[/tex] - Initial height with respect to ground, measured in meters.

[tex]z_{f}[/tex] - Final height with respect to ground, measured in meters.

According to the Work-Energy Theorem, the work needed to wind the chain plus the block equals the sum of both gravitational potential energies:

[tex]W = \Delta U_{g, chain}+U_{g,block}[/tex]

[tex]W = \frac{\lambda \cdot g}{2}\cdot (z_{f}^{2}-z_{o}^{2})+m_{block}\cdot g \cdot (z_{f}-z_{o})[/tex]

If we know that [tex]\lambda = 5\,\frac{kg}{m}[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], [tex]z_{o} = 0\,m[/tex], [tex]z_{f} = 70\,m[/tex] and [tex]m_{block} = 35\,kg[/tex], the work required to wind the chain onto the cylinder if a block is attached to the end of the chain is:

[tex]W = \frac{\left(5\,\frac{kg}{m} \right)\cdot \left(9.807\,\frac{m}{s^{2}} \right)}{2}\cdot [(70\,m)^{2}-(0\,m)^{2}]+(35\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (70\,m-0\,m)[/tex]

[tex]W = 144162.9\,J[/tex]

The work required to wind the chain plus the block is 144162.9 joules.

Answer:

Should be 1.12N

Explanation:

Cause 6×2=12

Answer:

1.12 Newtons

Explanation:

F=ma, so if you convert the numbers, it's just 6 times 2.

Don't be distracted or intimidated by the units, they don't matter in this case. Force will always be in newtons, mass in grams, acceleration in m/s2 and velocity in m/s. They would only convert to their own smaller measurements.

At its maximum height y, the ball has zero vertical velocity. So we have

0² - (23 m/s)² = 2 * (-g) * y

where g = 9.80 m/s² is the acceleration due to gravity. Solve for y :

y = (23 m/s)² / (2 * (9.80 m/s²))

y ≈ 27 m

Predator? like they hunt their prey

Answer:

prey

Explanation:

Answer:

a)  t₀ = 0.704 10⁻¹² s,  b)   #cycle = 2.05 10¹⁶ cycles ,  

c)    #_cycles = 7,418 10³² cycles,  d)   Δt = 4.6 10⁴ s

Explanation:

For this exercise we must use the relationship between the period and the frequency

       f = 1 / T

       T = 1 / f

let's apply this equation to our case

a) The time of a cycle is

       t = 1 / 1.420405 10¹²

       t₀ = 0.704 10⁻¹² s

b) number of cycles in 4 h

       t = 4 h (3600 s / 1h) = 14400 s

Let's use a direct rule of proportions (rule of three). If there is 1 cycle in t₀, how much cycle is there

      #_cycles = t (1 / t₀)

      #_cycle = 14400 s (1 cycle / 0.704 10⁻¹² s)

      #_cycle = 2.0454 10¹⁶ cycles

      #cycle = 2.05 10¹⁶ cycles

c) cycles since the age of the Earth

     t = 4.6 10⁹ years (365 days / year) (24 h / 1 day) (3600 s / 1 h)

     t = 5.2224 10²⁰ s

    #_cycles = t (1 / to)

    # _cycles = 5.2224 10²⁰ (1 / 0.704 10⁻¹²)

    #_cycles = 7,418 10³² cycles

d) Let's use the direct proportion rule. If you have a lag of Δt₁ = 1s at t₁ = 1 10⁵ years, what is the lag (Δt) at t = 4.6 10⁹ years

        Δt = t (Δt₁ / t₁)

        Δt = 4.6 10⁹ years (1 s / 10⁵ years)

        Δt = 4.6 10⁴ s

Answer:

1360*9.8

=13328 joules

Answer:

54 miles speed

Explanation:

Answer:

Explanation:

The work done by an object given it's distance and force can be found by using the formula

From the question

force = 20 N

distance = 10 m

The work done is

work done = 20 × 10

We have the final answer as

Hope this helps you

Answer:

75

Explanation:

just took it e2020

Answer:

60%

Explanation:

efficiency= useful/input x 100%,

Here, kinetic energy is useful for food processor (i.e. spinning blades)

600J/1000J=60%

Answer:

W = 650 [kJ]

Explanation:

The definition of work is denoted by the product of force by the distance traveled by the body, this distance traveled corresponds to the direction of the force.

In this case we have:

d = distance = 2.6[km] = 2600 [m]

F = force = 250 [N]

W = F*d = 250 * 2600 = 650000 [J] or 650 [kJ]

Answer:

A

Explanation:

Because u can just go back to where u started in just ten seconds

Answer: adjective. having the quality of corroding or eating away; erosive. harmful or destructive; deleterious: the corrosive effect of poverty on their marriage. sharply sarcastic; caustic: corrosive comments on the speaker's integrity.

Explanation:

Answer:

The acceleration of the rock is negative throughout the whole motion. (TRUE)

The acceleration of the rock is zero at the peak of the trajectory (FALSE)

The velocity of the rock is positive throughout the whole motion (FALSE)

The position of the rock is positive or zero throughout the whole motion (TRUE)

The velocity of the rock is positive throughout the whole motion (FALSE)

Explanation:

1)The acceleration of the rock is negative throughout the whole motion. (TRUE)

Using the upward direction as positive

Then, The acceleration of the rock is negative throughout the whole motion.

2)The acceleration of the rock is zero at the peak of the trajectory.(FALSE)

Only the velocity can be zero at the peak the trajectory, the acceleration is not zero

3)The velocity of the rock is positive throughout the whole motion (FALSE)

Using the upward direction as positive, The velocity of the rock is only positive when going in upward direction and vice versa

4)The position of the rock is positive or zero throughout the whole motion (TRUE)

When the rock get down it will have a zero position, then when it get to the peak it will have positive position

Answer:

A

Explanation:

75km

I dont really know how to do the math but thats what my teacher told me when i asked

When the vehicle travels 53 km both north and east, then the resultant displacement of the vehicle would be 74.95 kilometers.

An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard.

Displacement describes this shift in location.

As given in the problem when the vehicle travels 53 km both north and east, then we have to find the resultant displacement of the vehicle,

The vehicle's displacement in the north direction = 53 kilometers

The vehicle's displacement in the east direction =53 kilometers

The resultant vehicle's displacement= √(53² + 53²)

                                       = √5618

                                       = 74.95 kilometers

Thus ,the resultant displacement of the vehicle is 74.95 kilometers in the northeast direction.

Learn more about displacement here, refer to the link;

brainly.com/question/10919017

#SPJ2

Answer:

+%_×¥+₩ £kshnow sjsni niadk lplz kfkd skidk skkkim

Formula: s = d/t

s = speed

d = distance

t = time

We are given the distance and time, so we can use that to solve for the speed.

s = 100/16.6

s ≈ 6.02m/s

Best of Luck!

Answer:

c- Time

Explanation:

The time will tell depending on the person who is exercising, the rate of time, the  workout time. & limits on weights....

Answer:

The guy above me is wrong the real answer is D

Explanation: