Two boats move downstream with different speeds. When one overtakes the other, a floating ball is dropped into the water. Later both boats turn back simultaneously and move with their previous speeds relative to water towards the ball. Which boat reaches the ball first?
Options

Question

Two boats move downstream with different speeds. When one overtakes the other, a floating ball is dropped into the water. Later both boats turn back simultaneously and move with their previous speeds relative to water towards the ball. Which boat reaches the ball first?

Options

G1 Physics · Accepted Answer

In the frame of water, the floating ball is at rest. Both boats travel away for the same time and then return with the same respective speeds that took them away. Each therefore takes exactly the same return time as its outward time. They reach the ball simultaneously. Option C.