Question

A 2 kg ball moving at 4 m/s to the right collides with a 3.0 kg ball moving at 2.0 m/s to the left. A) What is the total momentum before the collision? B) After the collision, if the first ball now moves at 1.2 m/s to the left, what is the momentum of the second ball? C) Then, using your answer for B, find the velocity of the second ball after the collision. (right is + left is -) (round answers to 1 dp)

A) 2

B)?

C)1.5

Answer 1

mi = 2 kg , l = 4 mls, My = 3 kg, u = 2 mild mi 10 of 11 il Total 2 12 Total momentum Before Collision momentum ofth collision (PAT = (PA + Pisaften (m, ce - for Paste (2x 4 ) + 3(-2) Paften 2 negals B PB) Before + m Before 3 Pastu 5 mt 1) mo , 21-1-2) + (P) after (me + m) Before (must ma l (2x4) + 31-21 2 +2.4 = b) after Rafth - 4.4 kg culs

(C) (1) after mily = 4.4 lgmuld Pr 404 m 4 = 1.4 67 mi) 3 [ 10 2 = 1.5 ml