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Energy, Work, Machines
Test Description: Final Exam Review Part D
Instructions: Answer all questions to get your test result.
1) Potential Energy is:
A
energy that has been destroyed.
B
energy that is spontaneously created.
C
energy of motion.
D
stored energy.
2) A person sweeping a floor would be an example of a:
A
3rd class lever
B
2nd class lever
C
1st class lever
3) Both work and energy can be measured in:
A
horsepower
B
joules
C
watts
D
newtons
4) On a roller coaster, the bottom of a steep hill would feature a high level of:
A
potential energy
B
kinetic energy
5) Which of the following simple machines make up a pair of scissors?
A
pulley
B
both lever and wedge
C
lever
D
wedge
6) A crane does 4000 J of work in 5 seconds. What is the power of the crane?
A
1600 watts
B
20000 watts
C
800 watts
D
40000 watts
7) What is the kinetic energy of a 23 kg cart going 9 m/s?
A
932 J
B
207 J
C
2.6 J
D
186.3 J
8) A light bulb is considered to be doing work because it is converting electrical energy into light and thermal energy.
A
False
B
True
9) A 59,000 kg on the edge of a 200 m high cliff would have a potential energy of:
A
11,800,000 J
B
118,000,000 J
C
295 J
10) 12 HP is equivalent to:
A
62.2 watts
B
8952 watts
C
.016 watts
D
150 watts
*select an answer for all questions
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