Question 1

In a first-class lever, where is the fulcrum located relative to the effort and load?

Accepted Answer

The fulcrum is located between the effort force and the load, like a seesaw or crowbar.

Question 2

What is the mechanical advantage of a lever when the effort arm is 8 feet and the resistance arm is 2 feet?

Accepted Answer

The mechanical advantage is 4. Mechanical advantage = effort arm length ÷ resistance arm length (8 ÷ 2 = 4).

Question 3

A wheelbarrow is an example of which class of lever?

Accepted Answer

A wheelbarrow is a second-class lever, where the load is between the fulcrum (wheel) and the effort (handles).

Question 4

In a third-class lever, where is the effort force applied?

Accepted Answer

In a third-class lever, the effort is applied between the fulcrum and the load, as in a fishing rod or tweezers.

Question 5

How much force is required to lift a 200-pound load using a single movable pulley (ignoring friction)?

Accepted Answer

100 pounds. A single movable pulley provides a mechanical advantage of 2, halving the required effort force.

ASVAB Mechanical Comprehension Mastery

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