TOPIC :WORK, ENERGY AND POWER
Number of questions are 252, Select_Question:

QUESTION
Q1) If momentum is increased by 20% then kinetic energy increased by..[ AFMC 1997]




SOLUTION

Formula for kinetic energy in terms of momentum is
equation for kinetic energy
momentum is increased by 20% thus new momentum p'=1.2p
Substituting of p' in above equation we get
equation for kE
Thus increase in KE=44%
Answer: (c)