Work Energy Power Future Flashcard Questions

Front

Calculate the gravitational potential energy (GPE) of a 2 kg mass that is 4 meters above the ground. GPE = mgh

Back

GPE = 2 kg * 9.8 m/s² * 4 m = 80 J

Front

What is the law that states energy can never be created nor destroyed, only changed from one form to another?

Back

Law of conservation of energy

Front

In which situation is no work considered to be done by a force?

Back

When the angle between the force and displacement is 90°.

Front

Work done to slow an object down is equal to what?

Back

Change in kinetic energy.

Front

What is energy in motion called?

Back

Kinetic Energy.

Front

What is the formula for gravitational potential energy?

Back

GPE = mgh, where m = mass, g = acceleration due to gravity, h = height.

Front

What is the unit of work and energy in the International System of Units (SI)?

Back

Joule (J).

Front

What is the relationship between work, force, and displacement?

Back

Work = Force x Displacement x cos(θ), where θ is the angle between the force and displacement.

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv², where m = mass and v = velocity.

Front

What happens to the total mechanical energy in a closed system?

Back

The total mechanical energy remains constant, as per the law of conservation of energy.