March 28, 2017

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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

  • physic - ,

    remember the rope lifts (reduces force normal) and pulls the sled. So break up the pulling force into vertical and horizontal components.
    I will be happy to critique your thinking.

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