Question

What is the kinetic energy of a rock of mass 220g after it has fallen freely for 5seconds?g=10m/s2?

Answer 1

V = Vo + g*t = 0 + 10*5 = 50 m/s.

KE = 0.5M*V^2 = 0.5*0.22*50^2 = ___ Joules.