Which best explains what will happen if Sharilyn unscrews a bolt with a short handled wrench?
The bolt will be easier to unscrew because it is closer to the fulcrum and the mechanical advantage will be reduced.
The bolt will be harder to unscrew because it is farther from the fulcrum and the mechanical advantage will be greater.
The bolt will be easier to unscrew because it is farther from the fulcrum and the mechanical advantage will be greater.
The bolt will be harder to unscrew because it is closer to the fulcrum and the mechanical advantage will be reduced.
The last choice is the correct one. This is the reason that wrenches have long handles.
If the bolt is really stuck or rusted on there, a person who is careful and knows what he's doing will sometimes put one end of a 2-ft pipe over the wrench-handle, and then push on the other end of the pipe. Pushing on a point that's farther away from the bolt always makes it easier to unscrew.
