# 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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