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Two balls with masses and speed as shown collide into each other. Their plane of contact is vertical. Determine their respective speed after the collision if the coefficient of restitution e is 0.5 and determine also the average impulsive force that acts between them if the two balls are in contact for 0.5sec.

plane of contact
m = 0.5 kg
V4=3 m/s
mg = 0.8 kg
Vg =5 m/s

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