Which example best describes mechanical advantage?
A. A fixed pulley changes the direction that you pull.
B. Greasing a surface reduces friction
C. A longer lever helps lift more weight.

Question

Which example best describes mechanical advantage?
A. A fixed pulley changes the direction that you pull.
B. Greasing a surface reduces friction
C. A longer lever helps lift more weight.

fantalux · Answer

i would say A because the actual meaning of that is the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.

anonymous · Answer

mechanical advantage trades distance traveled for force applied - which one do you think it is?

anonymous · Answer

A

anonymous · Answer

But A only changes the direction of force, there is no exchange between the distance and force.

anonymous · Answer

ya

anonymous · Answer

so it is not A.

fantalux · Answer

If its not A then what would it be???? I would say c cuz theres no mention of that in the definition.

fantalux · Answer

No mention of whats in b i mean...oops.

anonymous · Answer

the definition for mechanical advantage clearly states, that it is based on the "law of the lever"

fantalux · Answer

Oh so c is correct.