Energy, Work, Machines: Question Preview (ID: 15385)

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Potential Energy is:
a) energy of motion. b) stored energy. c) energy that is spontaneously created. d) energy that has been destroyed.
A person sweeping a floor would be an example of a:
a) 1st class lever b) 2nd class lever c) 3rd class lever d)
Both work and energy can be measured in:
a) newtons b) watts c) horsepower d) joules
On a roller coaster, the bottom of a steep hill would feature a high level of:
a) potential energy b) kinetic energy c) d)
Which of the following simple machines make up a pair of scissors?
a) pulley b) lever c) wedge d) both lever and wedge
A crane does 4000 J of work in 5 seconds. What is the power of the crane?
a) 20000 watts b) 40000 watts c) 800 watts d) 1600 watts
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
A light bulb is considered to be doing work because it is converting electrical energy into light and thermal energy.
a) True b) False c) d)
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) 295 J c) 118,000,000 J d)
12 HP is equivalent to:
a) 62.2 watts b) 8952 watts c) .016 watts d) 150 watts
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