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 door is hardest to open when you push:
Answer: Near the hinges
Pushing near the hinges gives a tiny lever arm, requiring far more force to produce the same torque.
Two equal and opposite forces acting on a wheel at its edges create a:
Answer: Couple producing rotation
A couple is two equal opposite forces that produce pure rotation without net linear force.
A 100 N force pushes a crate but it does not move. The opposing force from friction must be:
Answer: 100 N
Since the crate stays still, friction exactly balances the applied force at 100 N.
Increasing the force on a wrench while keeping the handle length fixed will:
Answer: Increase the torque
Torque grows directly with applied force when the lever arm stays constant.
A nut needs 24 N·m of torque to turn. Using a 0.3 m wrench, what minimum force is needed?
Answer: 80 N
Force equals torque divided by length, so 24 ÷ 0.3 = 80 N.
Which action does NOT change an object's torque about a pivot?
Answer: Painting the object a different color
Color has no effect on torque, which depends only on force, distance, and angle.
A beam balances on a pivot with equal weights at equal distances. This beam is in:
Answer: Equilibrium
When opposing torques are equal, the beam is balanced and in equilibrium.