Free Printable Work-energy theorem

1.

45 J of work were done on the object that moved 5 meters. How much force was applied to the object?

a)

8 N

b)

225 N

c)

9 N

d)

0 N

2.

The net work done by a net force acting on an object is equal to the change in the kinetic energy of the object.

a)

Force-Work Theorem

b)

Work-Kinetic Energy Theorem

c)

Force-Kinetic Energy Theorem

d)

Work-Force Theorem

3.

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What is the amount of work needed to accelerate the box?

a)

50 J

b)

60 J

c)

20 J

d)

45 J

4.

When my velocity triples, my kinetic energy increases by ______ times.

a)

9

b)

3

c)

1.5

d)

4.5

5.

Calculate the force necessary to move a 1000 kg car from rest to 25 m/s in 130 m.

a)

19 N

b)

25,0000 N

c)

2400 N

d)

3.3 x 10⁶ N

6.

What are the units for Work?

a)

Newtons

b)

Kilograms

c)

Joules

d)

Moles

7.

What is the equation for Kinetic Energy (KE)?

a)

$KE\ =\ 2mv^2$

b)

$KE\ =\ 2mv$

c)

$KE\ =\ mv^2$

d)

KE\ =\ \frac{1}{2}mv^2

8.

Work can also be shown as

W\ =\ \Delta KE

How do you find

\Delta KE

?

a)

$KE_i\ -\ KE_f$

b)

$KE_f\ -\ KE_i$

c)

$KE\ +\ KPOP\ =\ BbyMtl$

d)

$42?$

9.

A 80.0-kg ﬁreman slides down a 3.00-m pole by applying a frictional force of 400. N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?

a)

2.1 m/s

b)

4.2 m/s

c)

5.5 m/s

d)

8.0 m/s

10.

For an object sliding on the ground, the friction force

a)

always acts in the same direction as the displacement

b)

always acts in a direction perpendicular to the displacement

c)

always acts in a direction opposite to the displacement.

d)

acts either in the same direction as the displacement or in the

direction opposite to the displacement depending on the value of the coefﬁcient of kinetic friction.

11.

Which of the following statements are true about potential energy?

a)

Both gravitational and elastic potential energy are dependent upon the speed of an object.

b)

Moving objects cannot have potential energy.

c)

None of these

d)

Potential energy is the energy stored in an object due to its position.

12.

A 12 kg book is pushed from rest to a final velocity of 10 m/s. The book travels 6 m. How much force was the book pushed with?

a)

600 N

b)

100 N

c)

200 N

d)

1200 N

13.

The product of the net force on an object and the distance through which the object is moved

a)

joule

b)

work

c)

power

d)

energy

14.

Which Equation matches:

"An object slides down a frictionless ramp."

a)

PE = KE

b)

W = PEel

c)

PE −W = KE

d)

W = PE

15.

Which Equation matches:

"An object is lifted up."

a)

PE = KE

b)

W = PEel

c)

PE −W = KE

d)

W = PE

16.

Which Equation matches:

"A moving object is stopped."

a)

PE = KE

b)

W = PEel

c)

PE −W = KE

d)

KE −W = 0

17.

Which Equation matches:

"A spring shoots an object."

a)

PEel= KE

b)

W = PEel

c)

PE −W = KE

d)

KE −W = 0

18.

Which Equation matches:

"A moving object speeds up."

a)

KE + W = KE

b)

W = PEel

c)

PE −W = KE

d)

KE −W = 0

Work-energy theorem

Total questions: 18

Worksheet time: 17mins

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