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Fall ACP Review - Energy Conserv. & W-E Theorem

Total questions: 35

Worksheet time: 31mins

Name
Class
Date
1.

Which statement best describes the energy transformation of the ball as it goes from point D to point G?

a)

Kinetic energy is converted into potential energy.

b)

Potential energy is converted into kinetic energy.

c)

Both the kinetic energy and potential energy remain constant.

d)

There is not enough information in the diagram.

2.

A rollercoaster cart is launched into a loop by a compressed spring that stores 25,000 Joules of potential energy (called spring potential). If the starting position is considered zero height (h=0) and there is no friction or air resistance, which pair of numbers describes possible values for the kinetic energy, KE, and the gravitational potential energy, PE, at point P?

a)

KE = 0 Joules

PE = 26,000 Joules

b)

KE= 19,000 Joules

PE= 6,000 Joules

c)

KE = 7,000 Joules

PE = 18,000 Joules

d)

KE = 18,000 Joules

PE = 7,000 Joules

3.
Which 2 letters have the most kinetic energy
a)
W & Y
b)
X & Z
4.
How much pontential energy is at the top of a hill on a rollar coaster ride
a)
100%
b)
50%
c)
0%
d)
20%
5.
Can energy be destroyed
a)
no
b)
yes
6.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
7.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
8.
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 
a)
Both the potential energy and kinetic energy decrease
b)
The potential energy decreases while the kinetic energy increases 
c)
The kinetic energy decreases while the potential energy increases 
d)
Bothe the potential energy and kinetic energy increase 
9.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
10.
Energy can be _____________ or changed from one type to another.
a)
destroyed
b)
transferred
c)
created
d)
ignored
11.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
12.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
13.
Energy is the ability to do work.
a)
True
b)
False
14.
If the Total Mechanical Energy is 50J, Potential Energy is 40 J, what is the Kinetic Energy?
a)
1 J
b)
10 J
c)
90 J
15.
At the bottom of the roller coaster, what kind of energy is NEVER present?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
16.
As energy transformations occur within a system, the total energy of the system ___.
a)
increases
b)
decreases
c)
is transferred out of the system
d)
remains constant
17.
The sum of the kinetic energy and the potential energy of the objects in a system is called _______.
a)
thermal energy
b)
complete energy
c)
energy maximum
d)
mechanical energy
18.
Which of the following statements about an apple falling from a tree is true?
a)
Its kinetic energy decreases and its potential energy increases.
b)
Its potential energy decreases and its kinetic energy increases.
c)
Its kinetic and potential energies remain constant.
d)
Its mechanical energy increases.
19.

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

20.

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 - Energy Theorem

c)

Force - Kinetic Energy Theorem

d)

Work - Force Theorem

21.

If a question asks you to calculated the work W done on an object but it doesn't give you the force F or distance d, instead it tell you the mass m and initial and final velocities. What do you do?

a)

Give up

b)

Cry

c)

Use K = 1/2 mv2 because W and K are the same

d)

Use ΔK = 1/2 m(vf2 − vi2) because W and ΔK are the same

22.

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

23.
When my velocity triples, my kinetic energy increases by ______ times.
a)
9
b)
 3 
c)
1.5
d)
4.5
24.

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

a)

1.274 x 106 J

b)

25,0000 J

c)

2403.85 J

d)

3.25 x 106 J

25.

What does work equal when the final change in kinetic energy equals 20,000 J?

a)

0J

b)

2041J

c)

20,000J

d)

4164931J

26.
What is mechanical energy?
a)
It is what metal creates when heated.
b)
All potential and kinetic energy in a system.
c)
It is motion of all matter.
d)
Energy of momentum.
27.
A change from one form of energy to another is called ___________.
a)
work
b)
power
c)
mechanical
d)
energy transformations
28.
What kind of energy does an object possess when it's resting on top of the hill?
a)
Potential Energy
b)
None
c)
Kinetic Energy
d)
All
29.

At point C, the roller coaster's total ME = 500 J, and its PE= 100 J. What is its KE?

a)

600 J

b)

400 J

c)

200 J

d)

100 J

30.
At the top of the roller coaster, which energy is ALWAYS present?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
31.
"Energy can be transformed from one form into another or transformed from one region or another, but energy cannot be created or destroyed."
Which law is this?
a)
Law of Conservation of Mass
b)
Newton's Second Law
c)
Law of Conservation of Energy
d)
Newton's Third Law
32.

Tarzan is swinging through the jungle looking for Jane. He is constantly moving back and forth..his kinetic energy is being changed to

a)

electrical

b)

chemical

c)

potential

d)

nuclear

33.
Which skier will have a greater potential energy? 
a)
Skier 1
b)
Skier 2
34.
What is happening at B?
a)
Lowest kinetic energy, highest potential energy
b)
Highest kinetic energy, lowest potential energy
35.

When you lift a heavy box 1 meter off the ground to put it on the table, you have to do ___________ on it. This results in an increase in _______________.

a)

work; potential energy

b)

potential energy; work

c)

work; kinetic energy

d)

energy; work

e)

work; power

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