WorksheetsWork, Power & Energy Exam Review
Total questions: 44
Worksheet time: 11hrs 0mins
Name
Class
Date
1.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used?
a)
360 W
b)
60 W
c)
3600 W
d)
600 W
2.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
3.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
4.
The faster an object moves, the ________ kinetic energy it has.
a)
more
b)
less
c)
none of the above
d)
all of the above
5.
The unit used to measure power is the
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
6.
Which of the following is the best example of work being done.
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
7.
On a roller coaster, where is maximum potential energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
8.
On a roller coaster, where is maximum kinetic energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
9.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
10.
What is the potential energy done in lifting a 50 kg barbell 6 m above the floor?
a)
150 J
b)
300 J
c)
1470 J
d)
2940 J
11.
What is the average power generated by Peter Quill aka Star Lord (m = 100 kg) running up a flight of stairs rising vertically 6 .0 m in 5.0 s?
a)
0.03 W
b)
817 W
c)
1176 W
d)
1993 W
12.
Groot rescues Rocket from the bottom of a deep pit. Groot expends 1000 J of energy lifting Rocket who has a mass of 50 kg out of the pit. How deep is the pit?
a)
0.5 m
b)
2 m
c)
4 m
d)
10 m
13.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
14.
A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is
a)
875 J
b)
175 J
c)
1750 J
d)
350 J
15.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
16.
Bro A bench presses 145-lbs five times in 20 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.
a)
Bro A did more work.
b)
Bro B did more work.
c)
Both Bros did the same amount of work.
d)
Bro
17.
Gravitational potential energy depends on the ________ and ________ of the object.
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction
18.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
19.
Which graph BEST shows the relationship of kinetic energy to potential energy as a book sits on the edge of a desk?
a)
A
b)
B
c)
C
d)
D
20.
True or False: A man would do more work if he pushes a box up a ramp faster.
a)
True
b)
False
21.
A boy HOLDS a book.
a)
Work
b)
No Work
22.
A girl LIFTS a bag.
a)
Work
b)
No Work
23.
As energy transformations occur within a system, the total energy (Mechanical Energy) of the system ___.
a)
increases
b)
decreases
c)
is transferred out of the system
d)
remains constant
24.
It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?
a)
200 J
b)
20.0J
c)
100 J
d)
10 J
25.
What is the kinetic energy of a 4 kg shot-put thrown with a velocity of 13 m/s
a)
676 J
b)
3.25 J
c)
17J
d)
338 J
26.
Which point has the greatest potential energy (GPE)?
a)
A
b)
G
c)
D
d)
C
27.
A bike rider approaches a hill at a speed of 5.5 m/s. The combined mass of the bike and rider is 87kg. Find the initial kinetic energy of the system.
The rider coasts up the hill. Ignoring friction, at what height will the bike come to rest?
The rider coasts up the hill. Ignoring friction, at what height will the bike come to rest?
a)
1316J
1.5m
1.5m
b)
1316J
2.5m
2.5m
c)
1457J
3.5m
3.5m
d)
none of the above
28.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
29.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how much kinetic energy does it have?
a)
9.8 J
b)
98 J
c)
10 J
d)
120 J
30.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how fast is it going just before hitting the ground?
a)
6.26 m/s
b)
39.2 m/s
c)
98 m/s
d)
2 m/s
31.
How do you find mechanical energy?
a)
weight x height
b)
potential + kinetic
c)
energy + weight
d)
none of these
32.
A 60. kilogram student climbs a ladder a vertical distance of 4.0 meters in 8.0 seconds. Approximately how much total work is done against gravity by the student during the climb?
a)
2.4 x 103 J
b)
3.0 x 103 J
c)
2.9 x 102 J
d)
2.4 x 104 J
33.
Energy due to motion is ____________ energy.
a)
Potential
b)
Energy
c)
Kinetic
d)
Friction
34.
If a cannonball flies at a speed of 15 m/s and has 675J of kinetic energy, what is its mass?
a)
90 Kg
b)
6 Kg
c)
350 Kg
d)
22.5 Kg
35.
When the speed of an object is doubled, its kinetic energy
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
36.
Belly-Flop Bennie dives from atop a tall flagpole into a swimming pool below. His potential energy at the top is 10,000 J. What is his kinetic energy when his potential energy reduces to 9.7 J?
a)
9.81J
b)
10,000J
c)
9.7J
d)
9,990.3J
37.
What is the energy of position or shape that depends on weight and height, also called stored energy?
a)
Energy
b)
Kinetic energy
c)
Potential energy
d)
Sound energy
38.
A car travels at a constant speed v up a hill from point A to point B. As the car travels from A to B, its gravitational potential energy
a)
increases and its kinetic energy remains the same
b)
remains the same and its kinetic energy decreases
c)
increases and its kinetic energy decreases
d)
remains the same and its kinetic energy remains the same.
39.
The transfer of heat through a fluid (liquid or gas) is...
a)
Conduction
b)
Convection
c)
Radiation
d)
Ablation
40.
What method of heat transfer is causing heat to flow from the tip of the spoon to the handle of the spoon?
a)
Conduction
b)
Convection
c)
Radiation
d)
Erosion
41.
What method of heat transfer do solar panels rely on?
a)
Conduction
b)
Convection
c)
Radiation
d)
Nucleation
42.
A wool blanket is an example of a good ___________.
a)
Radiator
b)
Conductor
c)
Insulator
d)
Equilizer
43.
Heat energy moves from __________ things to _________ things.
a)
warm / cold
b)
cold / warm
c)
liquid / solid
44.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
100 %
