Work, Power, Energy!

Front

What is potential energy?

Back

Stored energy that an object has due to its position or condition.

Front

How is potential energy calculated for an object at a height?

Back

Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h).

Front

What is kinetic energy?

Back

The energy an object has due to its motion.

Front

How is kinetic energy calculated?

Back

Kinetic Energy (KE) = 1/2 × mass (m) × velocity (v)².

Front

What is the law of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What happens to potential energy as an object falls?

Back

It is converted into kinetic energy.

Front

What is power in terms of work?

Back

Power is the rate at which work is done, calculated as Power = Work / Time.

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is equal to one Joule per second.

Front

If a car has 500,000 J of potential energy at the top of a hill, how much kinetic energy would it have at the bottom?

Back

500,000 J, according to the law of conservation of energy.

Front

What is the relationship between speed and kinetic energy?

Back

The faster an object moves, the more kinetic energy it has.