Benjamin+Hutcheson

I want to attend college at Georgia Tech and become a mechanical engineer.

When you are riding a mutli-speed bicycle up a steep hill, what do you do? I shift gears to get more power with the same effort.

Can you think of other examples where force or torque is changed to make a task easier? The torque of an electrical mixer is changed depending on what you want to mix. The torque applied to a wrench is increased as the bolt being tightened becomes tighter.