GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Watts
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Joule
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Horsepower
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Kilocal
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Detailed explanation-1: -The units of kinetic energy are mass times the square of speed, or kg · m 2 /s 2 kg · m 2 /s 2 . But the units of force are mass times acceleration, kg · m/s 2 kg · m/s 2, so the units of kinetic energy are also the units of force times distance, which are the units of work, or joules.
Detailed explanation-2: -The kinetic energy of an object is measured in Joules (J), kilojoules (kJ) or Megajoules (MJ).
Detailed explanation-3: -One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). One newton equals a force that produces an acceleration of one meter per second (s) per second on a one kilogram (kg) mass. Therefore, one joule equals one newton•meter.