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work-energy-11g-T2-

Total questions: 22

Worksheet time: 31mins

Name
Class
Date
1.
What has to happen when a force is exerted on an object for work to be done?
a)
the object moves
b)
the object stays still
c)
the object is heavy
d)
none of these
2.
What is kinetic energy?
a)
stored energy
b)
energy of motion
c)
energy of friction
d)
energy stored in chemical bonds
3.
How do we express the total amount of energy a moving object has?
a)
KE x PE
b)
KE + PE
c)
KE - PE
d)
KE / PE
4.
When a roller coaster cart falls towards the ground, what happens to its potential energy?
a)
Increases
b)
Decreases
c)
Stays the same
d)
Nothing
5.
What is the kinetic energy of a ball sitting on top of a hill?
a)
0 J
b)
less than 0 J
c)
more than 0 J
6.
The Law of Conservation of Energy states that total amount of energy in a closed system will always
a)
stay the same
b)
increase
c)
decrease
d)
cannot be determined
7.
Based on the formula for potential energy, what 2 variables influence PE the most?
a)
mass and height
b)
mass and velocity
c)
velocity and height
d)
velocity and mass
8.
In which situation is NO work done?
a)
picking up a book bag
b)
dropping the bookbag
c)
carrying the bookbag
d)
none of these
9.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
10.
The SI unit of work is?
a)
Joules
b)
Watts
c)
Newtons
d)
meters
11.
What is the formula for Gravitational Potential Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
12.
What is the formula for Kinetic Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
13.

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

14.
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
15.

What is the ΔKE of a baseball hit with a force of 6000 N that travels 120 m across the field?

a)

6000J

b)

43560000J

c)

720000J

d)

50J

16.

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

17.
When my velocity triples, my kinetic energy increases by ______ times.
a)
9
b)
 3 
c)
1.5
d)
4.5
18.

Which of the following is defined as an energy transfer?

a)

kinetic energy

b)

work

c)

potential energy

d)

chemical energy

19.

Rank in order, from largest to smallest, the gravitational potential energies of the balls.

a)

1 > 2 = 4 > 3

b)

1 > 2 > 3 > 4

c)

3 > 2 = 4 > 1

d)

3 > 2 > 4 > 1

20.

Four students run up the stairs in the time shown. Which student has the largest power output?

a)

A

b)

B

c)

C

d)

D

21.

What is the unit for power?

a)

what

b)

watt

c)

joule

d)

Jewel-Osco

22.

How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s?

a)

400 W

b)

1000 W

c)

1600 W

d)

4000 W

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