Exploring Simple Machines and Mechanics

What is the formula for calculating work done when a force is applied to move an object a certain distance?

A lever is used to lift a 200 N weight. If the effort force applied is 50 N, what is the actual mechanical advantage of the lever?

• 2

• 3

• 4

• 5

Explain why the ideal mechanical advantage of a machine is always greater than the actual mechanical advantage.

• Because of friction and other losses

• Because ideal conditions are always met

• Because machines are perfect

• Because effort force is always greater

Calculate the work done if a force of 10 N is applied to move an object 5 meters.

• 15 J

• 25 J

• 50 J

• 100 J

A pulley system has an ideal mechanical advantage of 5. If the resistance force is 100 N, what is the effort force required?

• 10 N

• 20 N

• 25 N

• 50 N

Describe how the resistance distance affects the mechanical advantage of a lever.

• Longer resistance distance increases mechanical advantage

• Shorter resistance distance decreases mechanical advantage

• Resistance distance does not affect mechanical advantage

• Longer resistance distance decreases mechanical advantage

What is the resistance force if a machine has an actual mechanical advantage of 3 and an effort force of 30 N?

• 60 N

• 90 N

• 100 N

• 120 N

Identify the simple machine that consists of a wheel with a rope or cable wrapped around it.

• Lever

• Pulley

• Inclined Plane

• Wedge

A ramp is used to lift a box to a height of 2 meters. If the length of the ramp is 10 meters, what is the ideal mechanical advantage of the ramp?

• 2

• 3

• 4

• 5

Discuss the factors that can cause the actual mechanical advantage to be less than the ideal mechanical advantage in a pulley system.

• Friction and weight of the pulley

• Ideal conditions are always met

• Effort force is always greater

• Machines are perfect