Question

What is the kinetic energy of an object if mass is 3kg and momentum is 45kgm/s?
(Explain) ​

Answer 1

Answer:

337.5 kgm^2/s^2

Explanation:

Momentum(P) = mv

.: P = mv = 3 × v

45 = 3 × v

v = 15 m/s

Kinetic Energy(KE) = (mv^2)/2

.: KE = (mv^2)/2 = 3 × (15)^2 × 1/2

KE = 3 × 225 × 1/2

KE = 337.5 kgm^2/s^2