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You are trying to determine the velocity of an asteriod using an elastic collision. You fire...

You are trying to determine the velocity of an asteriod using an elastic collision.

You fire a 1 kg projectile to the right moving with speed 1 m/s toward on 100 kg mass that is moving left with some unknown speed. After an elastic collision, we measure that the launced projectile bounces back toward you with a speed of 40.58 m/s. Find the initial speed of the larger 100 kg mass

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