WorksheetsUnit B - Quiz 2 Review
Total questions: 12
Worksheet time: 3600secs
Name
Class
Date
1.
If an object moves from a high place to a lower place, will it gain or lose potential energy?
a)
lose
b)
gain
c)
neither
d)
both
2.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
3.
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?
a)
A
b)
B
c)
C
d)
D
4.
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
5.
50 J of work is done lifting a 20.0 N book in the air. How high was it lifted?
a)
2.5 m
b)
3.5 m
c)
0.4 m
d)
25 m
6.
If an object mass =30 Kg on the Earth, what would be it's weight (i.e. the force of gravity) on Earth?
a)
30 N
b)
300 kg
c)
3000N
d)
300 N
7.
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
8.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
9.
What is the sum of kinetic energy and potential energy of a system?
a)
mechanical energy
b)
electrical energy
c)
moving energy
d)
nuclear energy
10.
If the work done lifting an 60kg anvil to the top of a tower is 3600J, after being dropped, what is the kinetic energy of the anvil as it hits the ground?
a)
60J
b)
600J
c)
3.6J
d)
3600J
11.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's velocity?
a)
6.32 m/s
b)
40 m/s
c)
4.47 m/s
d)
100 m/s
12.
A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?
a)
100%
b)
7%
c)
93%
d)
95%
100 %
