A screw has a mechanical advantage of 8. How much force must you apply to the screw so that it has an output force of 750 N?

A. 550 N

B. 94 N

C. 55 N

D. 6000 N

Question

A screw has a mechanical advantage of 8. How much force must you apply to the screw so that it has an output force of 750 N?

A. 550 N

B. 94 N

C. 55 N

D. 6000 N

jfraser · Answer

$$MA = \frac{force \space output}{force \space input}$$you know the advantage and the neded output force, solve for the input force

anonymous · Answer

I worked that out and it was wrong, the answer was B.

jfraser · Answer

then you worked it out wrong.

If you rearrange to solve for input, then$$force input = \frac{force output}{MA} = \frac{750N}{8} = 93.75N \approx 94N$$