A 1.50 kg ball moving at 8.00 m/s south, strikes a 2.00 kg ball moving at 3.00 m/s south. If the velocity of the 2.00 kg ball after the collision is 4.50 m/s south, what is the velocity of the 1.50 kg ball

6m/s

Explanation:

Given that a 1.50 kg ball moving at 8.00 m/s south, strikes a 2.00 kg ball moving at 3.00 m/s south. If the velocity of the 2.00 kg ball after the collision is 4.50 m/s south, what is the velocity of the 1.50 kg ball

This is elastic collision.

M1U1 + M2U2 = M1V1 + M2V2

Substitute all the parameters into the formula above

1.5×8 + 2×3 = 2×4.5 + 1.5V

12 + 6 = 9 + 1.5V

18 = 9 + 1.5V

1.5V = 9

V = 9/1.5

V = 6 m/s

Therefore, the velocity of the 1.5kg ball is 6 m/s

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