WorksheetsEnergy Review
Total questions: 34
Worksheet time: 21mins
Name
Class
Date
1.
At which point is potential energy greatest
a)
W
b)
X
c)
Y
d)
Z
2.
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
3.
When a pendulum swings, at which point is kinetic energy highest:
a)
1
b)
2
c)
3
d)
4
4.
When a pendulum swings, at which point is potential energy at its greatest
a)
1
b)
2
c)
3
d)
4
5.
What is the unit used to measure work?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
6.
The ability to do work is....
a)
work
b)
power
c)
acceleration
d)
energy
7.
Which of the following objects has the most kinetic energy?
a)
A 20 kg toddler running at 5 m/s
b)
A 50 kg toddler running at 30 m/s
c)
A 90 kg toddler running at 30 m/s
d)
A 100 kg toddler running at 2 m/s
8.
How much gravitational potential energy does a 75 kg diver have stepping off the edge of a 5 m platform?
a)
375 J
b)
15 J
c)
147 J
d)
3, 678.75 J
9.
What unit is used to measure Energy?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
10.
How much kinetic energy does a moving object have if its mass is 100 kg and it is moving at a speed of 5 meters per second?
a)
2,500 J
b)
250 J
c)
1,250 J
d)
125,000 J
11.
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
12.
During energy transformations, energy is never ___.
a)
released as heat
b)
used to increase an object's potential energy
c)
completely transformed
d)
created or destroyed
13.
The total amount of potential and kinetic energy in a system is called ___.
a)
thermal energy
b)
complete energy
c)
energy maximum
d)
mechanical energy
14.
The kinetic energy of an object increases as its ___ increases.
a)
gravitational energy
b)
potential energy
c)
specific heat
d)
velocity
15.
1/2 mv2
a)
KE
b)
PE
c)
Work
d)
Power
16.
MGH
a)
KE
b)
PE
c)
Work
d)
Power
17.
What happens to the kinetic energy of a moving object is the mass stays the same, but the velocity increases?
a)
kinetic energy increases
b)
kinetic energy decreases
c)
kinetic energy stays the same
18.
IN which of the following is no work done
a)
climbing stairs
b)
lifting a book
c)
pushing a shopping car
d)
none of the above
19.
What is the unit of work?
a)
joule
b)
newton/meter
c)
watt
d)
all of the above
20.
If you exert a force of 10.N to lift a box over 1 m how much work do you do.
a)
11
b)
10
c)
5
d)
20
21.
If you do 40 joules of work lifting a 10N box, how high is the shelf you move it to.
a)
400m
b)
40m
c)
50m
d)
4m
22.
What is the formula for work?
a)
w=Fd
b)
KE=1/2mv2
c)
w=mgh
d)
w=1/2mv2+900
23.
Where in this basketball's arc is the kinetic energy the most? Assume that the ball has not yet hit the floor at E. Explain your reasoning.
a)
Point A
b)
Point E
c)
Point C
d)
Point B
24.
Where in this basketball's arc would the ball have the most potential energy? Assume that the ball has left the player's hand at A. Explain your reasoning.
a)
Point A
b)
Point B
c)
Point C
d)
Point D
25.
Kinetic Energy = ½ x mass x (speed ) 2. A woman and her great dane are jogging. The woman's mass is 100 kg and the dog's mass is 70 kg. They are both jogging at 2 m/s. Use the kinetic energy formula to show who has more kinetic energy, the woman or her dog.
a)
the woman
b)
her dog
26.
What happens to Gravitational Potential Energy as height increases?
a)
It increases
b)
It decreases
c)
It stays the same
27.
A 10 N force to the right displaces an object 5 meters to the right. How much work is done?
a)
15 J Positive work
b)
15 J Negative work
c)
50 J Positive Work
d)
50 J Negative Work
28.
Gravity pulls an object down with 20 N of force. A tension force pulls up with 10 N of force. Which force is doing negative work on the object?
a)
Gravity- It is pulling in the same direction as displacement
b)
Gravity- it is pulling in the opposite direction of displacement
c)
Tension- It is pulling in the same direction of displacement
d)
Tension- It is pulling in the opposite direction of displacement.
29.
Which form of energy is often dissipated away from systems?
a)
Chemical Potential
b)
Gravitational Potential
c)
Elastic Potential
d)
Thermal Energy
30.
Why is thermal energy typically not useful for doing work on objects?
a)
Because the trillions of moving molecules are all moving in different directions.
b)
Thermal energy always directs all molecules in the same direction so it is useful for doing work.
c)
Don't click this... it isn't the answer.
d)
The inner ear of a human is fantastic
31.
The graph could represent...
a)
A falling object with no friction...
b)
A falling object with friction
c)
An object moving horizontally along a flat, non-elevated, surface.
d)
An object that is sitting still
32.
Which force would have likely caused some of the kinetic energy to transform into thermal energy?
a)
Normal Force
b)
Gravitational Force
c)
Applied Force
d)
Friction Force
33.
Assuming the object represented by the graph is an object in free fall, which statement would be true?
a)
The object is at the very top of it's fall
b)
The object is is falling through a frictionless environement
c)
The object is resting on the ground
d)
The object is transforming gravitational potential energy to kinetic and thermal energy
34.
An object is pushed directly to the right with an applied force of 5 Newtons. The friction force is directly to the left with a force of 2 Newtons. Gravitational Force is pulling down with 5 Newtons and Normal Force is pushing up with 5 Newtons. Which of the forces is doing NO WORK on the object?
a)
Applied force
b)
Friction Force
c)
Gravitational Force
d)
All are doing work
100 %
