Question

A massive ball of mass 5 kg 10 cm radius rolling without sliding on a rough flat surface with a speed of 2 ms ^ -1, then the kinetic energy of the ball is

Answer 1

Given,

m = 5 kg
v = 2 m/s
KE = __?

Kinetic Energy

KE = (7/10) m v²
KE = (7/10) • 5 • 2²
KE = 14 J