A particle with rest mass m moves with speed 0.6c.Its kinetic energy is: A)0.18mc² B)0.22mc² C)0.25mc² D)mc² E)1.25mc²

Question

Quizplus · Accepted Answer

The kinetic energy of a particle with rest mass m moving at speed v is given by K = (γ - 1)mc², where γ = 1/√(1 - (v/c)²). Plugging in the given values, we get γ = 1/√(1 - 0.6²) = 1.25. Therefore, K = (1.25 - 1)mc² = 0.25mc². The correct choice is C.

A Particle with Rest Mass M Moves with Speed 0