A boat weighing 9.0 * 102 newtons requires a horizontal force of 6.0 * 102 newtons to move it across the water at 1.5 * 101 meters per second. The boat's engine must provide energy at the rate of

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Physics

Sammy Schneider

5 May, 04:26

A boat weighing 9.0 * 102 newtons requires a horizontal force of 6.0 * 102 newtons to move it across the water at 1.5 * 101 meters per second. The boat's engine must provide energy at the rate of

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Fletcher Forbes · Answer 1

- - The boat's engine is providing 600 newtons of force.

- - Every second, the force pushes on the boat for 15 meters.

- - So during that second, the engine does (15 x 600) = 9,000 J of work.

- - The rate at which the engine provides energy to move the boat is

9,000 joules per second = 9,000 watts.

- - (The energy comes from chemical energy

stored in the gas that the engine burns.)