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Two balls of masses 2 kg and 4 kg are mo...

Two balls of masses `2 kg` and `4 kg` are moved towards each other with velocities `4m//s` and `2m//s`, respectively, on a frictionless surface. After colliding, the `2kg` ball returns back with velocity `2m//s`. then find
a. velocity of the `4 kg` after collision
b. coefficient of restitution e,
c. impulse of deformation `J_(D)`
d. maximum potential energy of deformation,
e. impulse of reformation `J_(R)`

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