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December 18, 2014

Homework Help: Physics

Posted by John on Monday, February 25, 2008 at 2:32pm.

A power boat of mass 495 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 780 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, independent of the boat's speed.
(a) How far does the boat coast?
m
(b) How much time does it take for the boat to come to rest after the engine is turned off?

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