when you want to pull downward to lift something, the main advantage of passing a rope upward?

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when you want to pull downward to lift something, the main advantage of passing a rope upward?

and through a single pully, rather than just up over the branch of a tree, is that the pully________. A. generates some of the force for you B. changes the pulling direction C. Makes the rope stronger D. Reduces friction. Please Help!!!!!!!!!!!!!!

2007-05-22 05:02:45 · 3 answers · asked by SAM 1 in Science & Mathematics ➔ Physics

3 answers

A pulley reduces friction. The rope would rub against the tree, but a pulley turns naturally and would hopefully be lubricated.

2007-05-22 05:07:17 · answer #1 · answered by TychaBrahe 7 · 0⤊ 0⤋

2007-05-26 10:53:02 · answer #2 · answered by johnandeileen2000 7 · 0⤊ 0⤋

2007-05-22 12:06:35 · answer #3 · answered by lil' 2 · 0⤊ 0⤋