SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1/4
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1/2
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4
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Detailed explanation-1: -Q25) A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain the same? Since speed is doubled, its square will become 4 times. Hence, kinetic energy increases by 4 times.
Detailed explanation-2: -When the speed of a body is doubled, its kinetic energy will increase.
Detailed explanation-3: -If the speed of the object becomes double, its kinetic energy changes to four times the initial kinetic energy.
Detailed explanation-4: -The energy of the body in motion by virtue of motion is called kinetic energy. m is the mass of the body, v is the speed of the body. Now, the speed is four times. So the kinetic energy becomes 16 times.
Detailed explanation-5: -If velocity v is doubled, the kinetic energy becomes four times as kinetic energy is directly proportional to the square of velocity.