Bennett Mechanical Test Force and Torque 5

Question 1

A uniform plank rests on a pivot at its center. Adding weight to one end will cause that end to:

Accepted Answer

Tip downward

Answer

Rise upward

Answer

Stay level

Answer

Spin freely

Question 2

Which combination produces the greatest torque?

Accepted Answer

Large force, long lever arm

Answer

Large force, short lever arm

Answer

Small force, long lever arm

Answer

Small force, short lever arm

Question 3

A wheelbarrow makes lifting easier because the load sits:

Accepted Answer

Close to the wheel pivot, shortening the load arm

Answer

Far from the wheel pivot

Answer

Directly over the handles

Answer

At the same point as the handles

Question 4

If the net torque on a stationary object is not zero, the object will:

Accepted Answer

Begin to rotate

Answer

Remain perfectly still

Answer

Move in a straight line only

Answer

Lose its mass

Question 5

A bolt requires 18 N·m of torque. A wrench applies 90 N of force. What handle length is needed?

Accepted Answer

0.2 m

Answer

0.5 m

Answer

1.6 m

Answer

5 m

Question 6

Pushing a revolving door at the edge rather than near the center is easier because the edge gives:

Accepted Answer

A longer lever arm

Answer

A heavier door

Answer

Less friction

Answer

More mass

Question 7

Two opposing torques of 15 N·m and 10 N·m act on a wheel. The net torque is:

Accepted Answer

5 N·m in the direction of the larger torque

Answer

25 N·m

Answer

150 N·m

Answer

0 N·m