A breaker bar's longer length increases what quantity when applying the same force?

• A. Speed
• B. Mass
• C. Torque
• D. Temperature

Answer: (C)

Torque is the twisting force you generate, and it depends on two things: how hard you push and how far from the fulcrum you push, i.e., the lever arm. When you use a breaker bar, lengthening the handle increases that lever arm. With the same amount of force from your hand, a longer bar multiplies that force into a greater torque, so you get more twisting effort on the fastener. That’s why a longer breaker bar makes it easier to loosen tightly tightened bolts.

The other options don’t describe what changes with a longer handle. Speed isn’t directly increased by lengthening the bar; mass isn’t altered by applying force in this context, and temperature isn’t an immediate effect of bar length alone.