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

A single fixed pulley provides no mechanical advantage but lets you pull down to lift up, changing force direction.

Question 2

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

Accepted Answer

Between the effort and the load

Answer

A first-class lever has the fulcrum positioned between the effort and the load, like a seesaw.

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

Mechanical advantage equals effort arm divided by load arm, so 12 ÷ 4 = 3.

Question 4

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

Accepted Answer

4

Answer

The ideal mechanical advantage of a block and tackle equals the number of rope segments supporting the load.

Question 5

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

Accepted Answer

Second-class lever

Answer

A second-class lever, like a wheelbarrow, has the load between the fulcrum and the effort.

Bennett Mechanical Test Practice Test