Physics Math

Question

How fast (in m/s) must a 2.7-g ping-pong ball move in order to have the same kinetic energy as a 145 g baseball moving at 35.0 m/s?

Answer 1

mv²/2 = Mu²/2

 

mv² = Mu²

 

v = √(Mu²/m) = u √(M/m)

 

u = 35.0 m/s

M = 0.145 kg

m = 0.0027 kg

 

Plug in the numbers and get v in m/s.