Question

A 5 g object moving to the right at 20 cm/s makes an elastic head-on-collision with a 10 g object that is initially at rest. The acceleration of gravity is 9.8 m/s^2 Find the speed of the first object immediately after the collision (cm/s). An 80 kg boy skates at 0.5 m/s toward a 60 kg girl who is skating directly toward him at 0.5 m/s. After colliding, they hold each other and the bruised couple slides together. What is the magnitude of the momentum (in N-s) of the boy before the collision? What is the magnitude of the total momentum (in N-s) of the boy and girl before the collision? Find the speed of the couple after the collision in m/s. Calculate the approximate energy (in J) lost by the couple in the collision.

Answer 1

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