Physics

To find the velocity of the ball relative to the shore, we need to consider both the speed of the boat and the speed of the ball. Since the ball is thrown in the direction opposite to the boat's motion, we subtract the ball's speed from the boat's speed.

Given:

Speed of the boat relative to the shore = 15 m/s

Speed of the ball relative to the boat = 15 m/s (in the opposite direction)