A 52-kg skater initially at rest throws a 5.0-kg medicine ball horizontally to t

Question

A 52-kg skater initially at rest throws a 5.0-kg medicine ball horizontally to the left. Suppose the ball is accelerated through a distance of 1.0 m before leaving the skater's hand at a speed of 5.0 m/s . Assume the skater and the ball to be point-like, the surface to be frictionless, and ignore air resistance. Use a vertical y-axis with the positive direction pointing up, and a horizontal x-axis with the positive direction pointing to the right.

Part A

Describe what happens to the skater and to the ball.

The skater and will move to the right and the ball will move to the left. The skater and the ball will both move to the left. The skater will stay at rest and the ball will move to the left.

Explanation / Answer

According to Newton's third law, the force exerted on the ball by the skater is opposite to the force exerted on the skater by the ball. both these forces are action pairs. So, the ball moves in left and skater moves in right.

Hence, the option 1 is correct.

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