Module 4 Review

What is work in physics terms?

• A. The amount of force applied to an object
• B. Energy transferred when a force moves an object through a distance
• C. The speed at which an object moves
• D. The mass of an object multiplied by its acceleration

If a machine has an output force of 300N and an input force of 100N, what is its mechanical advantage?

• 2
• 3
• 400
• 0.33

Which type of energy is stored in a compressed spring?

• A. Kinetic energy
• B. Chemical potential energy
• C. Elastic potential energy
• D. Mechanical energy

According to the Law of Conservation of Energy:

• A. Energy can be created but not destroyed
• B. Energy can be destroyed but not created
• C. Energy cannot be created or destroyed
• D. Energy can be both created and destroyed

What is power measured in?

• A. Joules
• B. Newtons
• C. Watts
• D. Meters

Which of the following is an example of a compound machine?

• A. A single lever
• B. A basic pulley
• C. A scissors
• D. An inclined plane

If a system has 80% efficiency, what does this mean?

• A. It produces more energy than it uses
• B. 80% of the input energy becomes useful output energy
• C. It wastes 80% of input energy
• D. It converts all energy perfectly

What is the relationship between work and time that defines power?

• A. Power = Time × Work
• B. Power = Work + Time
• C. Power = Work ÷ Time
• D. Power = Time ÷ Work

Which energy form is directly related to an object's motion?

• A. Potential energy
• B. Chemical energy
• C. Elastic energy
• D. Kinetic energy

What defines a simple machine?

• A. It must have multiple moving parts
• B. It changes force size or direction with one movement
• C. It must be powered by electricity
• D. It requires complex maintenance