Bennett Mechanical Test Force and Torque 4

Question 1

A force applied at 90° to a lever arm produces, compared to one applied at a slant, a torque that is:

Accepted Answer

Greater

Answer

Smaller

Answer

Zero

Answer

The same

Question 2

A bottle cap is hard to twist by hand but easy with a gripper that has a wide handle because the gripper:

Accepted Answer

Increases the lever arm and torque

Answer

Reduces the friction

Answer

Adds more force from the cap

Answer

Removes the need for force

Question 3

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:

Accepted Answer

Zero

Answer

30 N·m

Answer

60 N·m

Answer

15 N·m

Question 4

A mechanic uses a longer breaker bar instead of a short wrench mainly to:

Accepted Answer

Apply more torque with the same effort

Answer

Reach farther distances

Answer

Reduce the bolt size

Answer

Lower the friction in the bolt

Question 5

A 50 N weight hangs 0.4 m from a pivot. What torque does it exert?

Accepted Answer

20 N·m

Answer

50 N·m

Answer

12.5 N·m

Answer

125 N·m

Question 6

When two gears mesh, the larger gear turning the smaller gear results in the smaller gear having:

Accepted Answer

Less torque but higher speed

Answer

More torque and higher speed

Answer

Less torque and lower speed

Answer

More torque and lower speed

Question 7

A force that tends to rotate an object is best described as a:

Accepted Answer

Moment

Answer

Mass

Answer

Momentum

Answer

Velocity