When you want to pull downward to lift something, the main advantage of passing a rope upward and through a si

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When you want to pull downward to lift something, the main advantage of passing a rope upward and through a si

When you want to pull downward to lift something, the main advantage of passing a rope upward and through a single pulley, rather than just up over the branch of a tree, is that the pulley

a. generates some of the force for you
b. changes the pulling direction
c. makes the rope stronger
d. reduces friction

2007-01-20 09:43:55 · 2 answers · asked by Needs_help 1 in Science & Mathematics ➔ Physics

2 answers

d. reduces friction

2007-01-20 09:47:46 · answer #1 · answered by Barkley Hound 7 · 0⤊ 0⤋

b. changes the pulling direction.

The pulley doesn't generate any force or make the rope stronger.
Pulleys actually add a little friction.

2007-01-20 10:24:51 · answer #2 · answered by Anonymous · 0⤊ 0⤋