Grade 11Mechanics
Momentum of a body is increased by 20%.Find % increase in Kinetic Energy
Momentum of a body is increased by 20%.Find % increase in Kinetic Energy
2 Answers
Neel Pratik Bhatt
Dear Nitin,
Momentum = mass * velocity = force * time
Kinetic Energy = 1/2 * mass * velocity squared
Since the mass of your object is not likely changing, it is the velocity which is changing. Therefore, your new velocity is 1.2 times your initial velocity. In the kinetic energy equation, velocity is squared. 1.2 squared = 1.44, and since nothing else is changing, your kinetic energy is now 1.44 times initial. This is an increase of 28.8%.Is The Answer Clear?
-Neel Bhatt
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Nitin Gupta
Sorry! Your answer is wrong.The correct answer is 44%
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