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August 30, 2014

Homework Help: physic

Posted by Chan on Tuesday, October 20, 2009 at 4:14am.

Hi! please help
A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8 above the horizontal. The sledge moves a distance of 20.6 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500.
(a) What is the tension in the rope?
_____ N

(b) How much work is done by the rope on the sledge?
_____ kJ

(c) What is the mechanical energy lost due to friction?
_____ kJ
Thank you so much

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