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Chapter 7: Q9Q (page 170)

A boy stands on the back of a rowboat and dives into the water. What happens to the boat as he leaves it? Explain.

Short Answer

Expert verified

The boat will move in the forward direction.

Step by step solution

01

Understanding conservation of momentum

The conservation of momentum principle states that the total momentum of an isolated system remains conserved. In this problem, we will apply the law of conservation of momentum, considering the boy and rowboat as a system.

02

Determine the direction of the boat

The initial momentum of the boy and rowboat is zero because they are at rest. When the boy standing on the back of the boat dives into the water, he gains some momentum in the direction of the dive. The boat will move in the forward direction, opposite to the direction of the boy, with the same momentum in order to conserve the momentum of the entire system since the total momentum has to be zero. Thus, the boat move will move forward.

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FIGURE 7-37Problem 50.

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