Question

A bowling ball with a mass of 7.0 kg strikes a pin that has a mass of 2.0 kg. The pin flies forward with a velocity of 6.0 m/s, and the ball continues forward at 4.0 m/s. What was the original velocity of the ball?

Answer 1

momentum must be conserved(any external forces act on the objects)
\[m_1v+0=m_1v_1+m_2v_2\]

Answer 2

So how do I plug the numbers?

Answer 3

7*v=7*4+6*2

Answer 4

I got 5.7 m/s as my answer....

Answer 5

that's correct

Answer 6

Ok...thanks again!!!!

Answer 7

yw