Force and Torque Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Force and Torque flashcards as text
A 60 N force is applied to a wrench 0.5 m from the bolt. What torque is produced?
Answer: 30 N·m
Torque equals force times distance, so 60 N × 0.5 m = 30 N·m.
To loosen a stuck bolt with the least effort, where should you grip the wrench handle?
Answer: At the far end of the handle
Gripping farthest from the bolt increases the lever arm, producing more torque for the same force.
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?
Answer: 4 m from the pivot
Balance requires equal torques, so 40×2 = 20×d gives d = 4 m.
Which unit measures torque?
Answer: Newton-meter
Torque is force times distance, measured in newton-meters (N·m).
A force applied straight through the axis of rotation produces how much torque?
Answer: Zero
A force passing through the pivot has no lever arm, so it creates no turning effect.
If you double the length of a lever while keeping the force the same, the torque will:
Answer: Double
Torque is proportional to lever length, so doubling the length doubles the torque.
Which describes a force?
Answer: A push or pull on an object
A force is any push or pull that can change an object's motion.