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 force applied at 90° to a lever arm produces, compared to one applied at a slant, a torque that is:
Answer: Greater
A perpendicular force uses the full lever arm and gives the maximum torque.
A bottle cap is hard to twist by hand but easy with a gripper that has a wide handle because the gripper:
Answer: Increases the lever arm and torque
The wider handle increases the radius, multiplying the torque for the same hand force.
Two forces of 30 N each act in the same direction on opposite ends of a 1 m bar pivoted at center. The net torque is:
Answer: Zero
Same-direction forces on opposite sides of the pivot create opposing torques that cancel to zero.
A mechanic uses a longer breaker bar instead of a short wrench mainly to:
Answer: Apply more torque with the same effort
A longer bar increases the lever arm, raising torque for the same applied force.
A 50 N weight hangs 0.4 m from a pivot. What torque does it exert?
Answer: 20 N·m
Torque equals 50 N × 0.4 m = 20 N·m.
When two gears mesh, the larger gear turning the smaller gear results in the smaller gear having:
Answer: Less torque but higher speed
A smaller driven gear spins faster but with reduced torque compared to the larger driver.
A force that tends to rotate an object is best described as a:
Answer: Moment
The turning effect of a force about a pivot is called a moment, or torque.