Momentum And Collisions 4

Question

A pitcher claims he can throw a 0.159 kg baseball with as much momentum as a 3.5 g bullet moving with a speed of 1.50 ✕ 103 m/s.What must the baseball's speed be if the pitcher's claim is valid?

m/s 

Answer 1

M = mass of baseball (given)

v = speed of baseball = ? (to be solved for)

 

m = mass of bullet (given)

u = speed of bullet (given)

 

For both to have the same momentum, it is necessary that

 

Mv = mu

 

Then

 

v = mu/M

 

You are given the values of m, u, and M.  Convert m to kg, and substitute into the equation above to get v in m/s.