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 increase 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 increase the effect of the input force.
B. friction eliminates the work input.
C. Friction reduces the work input

anonymous · Answer

If the force is not greater than the weight of the bale, the bale will not move.

anonymous · Answer

yeah ^