A farmer tosses a rope over a beam at the top of a barn. He ties one end of the rope to a bale of hay. He then raises the bale up to the barn loft by pulling down on the loose end of the rope. Why does the input force have to be greater than the force needed to lift the bale?

a. Friction increases the effect of the input force.
b. Friction eliminates the work input.
c. Friction reduces the work input.

Question

A farmer tosses a rope over a beam at the top of a barn. He ties one end of the rope to a bale of hay. He then raises the bale up to the barn loft by pulling down on the loose end of the rope. Why does the input force have to be greater than the force needed to lift the bale?
 	
	a. Friction increases the effect of the input force.
	b. Friction eliminates the work input.
	c. Friction reduces the work input.

pooja195 · Answer

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