Bennett Mechanical Test Pulleys and Levers 2

Question 1

A single fixed pulley is used to raise a load. What is its main advantage?

Accepted Answer

It changes the direction of the applied force

Answer

It reduces the force needed by half

Answer

It doubles the speed of lifting

Answer

It eliminates friction entirely

Question 2

In a first-class lever, where is the fulcrum located?

Accepted Answer

Between the effort and the load

Answer

At the same point as the load

Answer

Beyond the load

Answer

Outside the lever arm

Question 3

A load is 4 ft from the fulcrum and the effort is applied 12 ft from the fulcrum. What is the mechanical advantage?

Accepted Answer

3

Answer

4

Answer

12

Answer

0.33

Question 4

A system of pulleys has 4 supporting rope segments lifting a load. What is the ideal mechanical advantage?

Accepted Answer

4

Answer

2

Answer

8

Answer

1

Question 5

Which type of lever has the load between the fulcrum and the effort?

Accepted Answer

Second-class lever

Answer

First-class lever

Answer

Third-class lever

Answer

Compound lever

Question 6

To lift a 200 lb load with a mechanical advantage of 4, how much effort force is required (ignoring friction)?

Accepted Answer

50 lb

Answer

100 lb

Answer

200 lb

Answer

800 lb

Question 7

When a movable pulley is used, what happens to the distance the rope must be pulled compared to the load's rise?

Accepted Answer

The rope is pulled twice as far

Answer

The rope is pulled half as far

Answer

The rope and load move equally

Answer

The rope does not move