Mechanical Advantage Quiz

What is the formula for calculating the mechanical advantage of a lever?

• MA = effort arm + resistance arm

• MA = effort arm - resistance arm

• MA = effort arm * resistance arm

• MA = length of effort arm / length of resistance arm

Name the three types of levers and provide an example of each.

• First-class, second-class, and third-class levers

• A, B, C levers

• Primary, secondary, tertiary levers

• One, two, three levers

How does a fixed pulley change the direction of the force?

• Upwards

• No change in direction

• Sideways

• Downwards

Explain the difference between a single fixed pulley and a single movable pulley.

• The single fixed pulley changes the direction of the force applied, while the single movable pulley provides a mechanical advantage by reducing the amount of force needed to lift an object.

• The single fixed pulley reduces the amount of force needed to lift an object, while the single movable pulley changes the direction of the force applied.

• The single fixed pulley and the single movable pulley both change the direction of the force applied.

• The single fixed pulley provides a mechanical advantage by reducing the amount of force needed to lift an object, while the single movable pulley does not provide any advantage.

What is the advantage of using an inclined plane to lift heavy objects?

• It increases the amount of force needed to lift heavy objects.

• It has no effect on the amount of force needed to lift heavy objects.

• It reduces the amount of force needed to lift heavy objects.

• It makes lifting heavy objects more difficult.

How does the length of an inclined plane affect its mechanical advantage?

• The shorter the inclined plane, the greater the mechanical advantage.

• The longer the inclined plane, the greater the mechanical advantage.

• The length of the inclined plane has no effect on mechanical advantage.

• The longer the inclined plane, the smaller the mechanical advantage.

What is the primary function of a wedge?

• To cook food evenly

• To measure temperature accurately

• To write with precision

• To split, lift, or hold an object in place

Give an example of a simple machine that uses a screw and explain how it works.

• A corkscrew is used to open cans.

• A screw jack is an example of a simple machine that uses a screw. It works by rotating the screw to lift heavy objects vertically.

• A screw jack is used to rotate objects horizontally.

• A screwdriver is used to cut through materials.

How does the pitch of a screw affect its mechanical advantage?

• The pitch of the screw does not affect its mechanical advantage.

• A higher pitch screw will have a lower mechanical advantage.

• A higher pitch screw will have a greater mechanical advantage.

• A lower pitch screw will have a greater mechanical advantage.

Explain the relationship between the number of threads on a screw and its mechanical advantage.

• More threads result in faster screwing but no change in mechanical advantage

• The number of threads has no effect on mechanical advantage

• More threads result in more mechanical advantage

• More threads result in less mechanical advantage