SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A skateboarder with a mass of 75.0 kg at the top of a 4.50 m ramp will have how much kinetic energy at the moment before they reach the bottom of the ramp? (g=9.81m/s2)
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3.31x103 KJ
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3.31 J
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3310.875 J
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3.31 KJ
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Explanation:
Detailed explanation-1: -“As skaters plunge down the ramp, they convert energy from one form into another, ‘’ says Doherty. “At the top of the ramp, the skaters have what we call gravitational potential energy-energy due to height above the ground. As they go down, it gets converted into kinetic energy, the energy of motion.”
Detailed explanation-2: -Kinetic energy K = K=21mv2=21×60×102=3000J.
Detailed explanation-3: -By the law of energy conservation, the potential energy at the top must be equal to the kinetic energy at the bottom of the ramp right before it stops.
There is 1 question to complete.