Bennett Mechanical Test Force and Torque 2 — Questions and Answers
Question 1: A 60 N force is applied to a wrench 0.5 m from the bolt. What torque is produced?
- 30 N·m (Correct answer)
- 12 N·m
- 60 N·m
- 120 N·m
Correct answer: 30 N·m
Torque equals force times distance, so 60 N × 0.5 m = 30 N·m.
Question 2: To loosen a stuck bolt with the least effort, where should you grip the wrench handle?
- At the far end of the handle (Correct answer)
- Close to the bolt head
- In the middle of the handle
- Grip location does not matter
Correct answer: At the far end of the handle
Gripping farthest from the bolt increases the lever arm, producing more torque for the same force.
Question 3: Two children sit on a seesaw. A 40 kg child sits 2 m from the pivot. Where must a 20 kg child sit to balance it?
- 4 m from the pivot (Correct answer)
- 2 m from the pivot
- 1 m from the pivot
- 8 m from the pivot
Correct answer: 4 m from the pivot
Balance requires equal torques, so 40×2 = 20×d gives d = 4 m.
Question 4: Which unit measures torque?
- Newton-meter (Correct answer)
- Newton
- Joule per second
- Kilogram
Correct answer: Newton-meter
Torque is force times distance, measured in newton-meters (N·m).
Question 5: A force applied straight through the axis of rotation produces how much torque?
- Zero (Correct answer)
- Maximum
- Equal to the force
- Half the force
Correct answer: Zero
A force passing through the pivot has no lever arm, so it creates no turning effect.
Question 6: If you double the length of a lever while keeping the force the same, the torque will:
- Double (Correct answer)
- Stay the same
- Halve
- Quadruple
Correct answer: Double
Torque is proportional to lever length, so doubling the length doubles the torque.
Question 7: Which describes a force?
- A push or pull on an object (Correct answer)
- A measure of mass
- A spinning motion only
- The speed of an object
Correct answer: A push or pull on an object
A force is any push or pull that can change an object's motion.
Bennett Mechanical Test Force and Torque 2
A 60 N force is applied to a wrench 0.5 m from the bolt.
What torque is produced?