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A ball with mass M = 5 kg is moving with speed V=10 m/s and collides...

A ball with mass M = 5 kg is moving with speed V=10 m/s and collides with another ball with mass m = 2.5 kg which is initially stationary. There is no other force such as gravity acting on the two balls. After the collision, both balls move at angle θ=30 degrees relative to initial direction of motion of the ball with mass M = 5 kg. a) What are the speeds of the two balls after the collision? b) What is the initial and final kinetic energy of the system? c) Is the collision Elastic or Inelastic?

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