Understanding Mechanical Energy

What is the unit of energy?

• Joule

• Newton

• Watt

• Pascal

Which of the following is NOT a form of energy in action?

• Heat energy

• Light energy

• Chemical energy

• Sound energy

What happens to energy when work is done?

• It increases

• It is transferred or transformed

• It is destroyed

• It remains unchanged

Which of the following is an example of kinetic energy?

• A stone at rest

• Water stored in a dam

• A swinging pendulum

• A compressed spring

What factor does NOT affect the potential energy of a body?

• Height of the body

• Mass of the body

• Acceleration due to gravity

• Color of the body

What is the potential energy of a body dependent on?

• Temperature, mass, and height

• Volume, mass, and speed

• Speed, mass, and height

• Mass, height, and acceleration due to gravity

Which type of potential energy is stored when an object is lifted above the ground?

• Magnetic potential energy

• Elastic potential energy

• Chemical potential energy

• Gravitational potential energy

What happens to a stone's potential energy when it falls?

• It increases

• It remains the same

• It converts to kinetic energy

• It disappears

Which of the following is an example of elastic potential energy?

• A flying plane

• A swinging pendulum

• A wound-up watch

• Water in a dam

What is the effect of height on gravitational potential energy?

• It is unaffected by height

• It decreases with height

• It increases with height

• It remains constant