2022 · Q102
If the linear momentum of a moving object changes by two times, then its kinetic energy will change by a factor of
general-sciencephysics-mechanics
- A2
- B4
- C6
- D8
Explanation
Kinetic energy can be written as KE = p²/2m for a body of mass m with momentum p. Doubling p multiplies p² by 4, so KE grows by a factor of 4 (mass unchanged). Equivalently, doubling velocity doubles momentum and quadruples KE since KE = ½mv².