- #1

- 57

- 3

## Homework Statement

In an Effort to tighten a bolt, a force F is applied to the end of a wrench that has a length L perpendicular to the wrench. If the bolt itself has a radius of b, how much force is applied to the bolt

## Homework Equations

∑τ=RFsinθ ΣF=ma ∑T=Iα

## The Attempt at a Solution

I tried summing the torques

∑τ=LF+bF=(I_bolt+I_wrench)α

but the answer choices are

a)F

b)Fb/L

c)FL/b

d)FL/(b+L)

e)bL/F

I'm not even sure how you would solve this to get anything like that or why there is an F in the answer when we're solving for F. My friend says this is a conceptual engineering problems and that c makes sense since the Force is multiplied by the length of the bolt (they are really looking for torque) but divided by the length of the wrench.