A ball with a mass of #6 kg# moving at #3 m/s# hits a still ball with a mass of #8 kg#. If the first ball stops moving, how fast is the second ball moving?
2 Answers
Momentum is conserved, so if the first ball stops from the collision, then the second ball will have the same momentum as the first ball did.
Explanation:
The momentum of the firs ball is:
If that ball stops, then all the momentum is transferred to the second ball,
Solve for
(6 X 3)/8 = 2.25 m per sec in the same direction
Explanation:
Use law of conservation of momentum.
Momentum = mass X Velocity
Ball 1 has mass
Ball 2 has mass
Initial momentum =
Ball 1 has final velocity
Ball 2 has final velocity
Final momentum =
Initial momentum = Final momentum
As initial velocity of Ball 2 is 0 before collision and velocity of Ball 1 is 0 after collision.