Energy

Front

What is Energy?

Back

Energy is the ability to do work or cause change. It exists in various forms, including kinetic, potential, thermal, and chemical energy.

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What is Gravitational Potential Energy?

Back

Gravitational Potential Energy is the energy stored in an object due to its height above the ground. It is calculated using the formula: PE = mgh (mass x gravity x height).

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy of an object in motion. It is calculated using the formula: KE = 1/2 mv² (1/2 x mass x velocity squared).

Front

At what position does a pendulum have the greatest gravitational potential energy?

Back

At the highest point of its swing.

Front

How do you calculate the potential energy of an object?

Back

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

Front

What is the formula for calculating Kinetic Energy?

Back

Kinetic Energy (KE) = 1/2 mv².

Front

What happens to the potential energy of an object as it falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases.

Front

What is the relationship between potential energy and height?

Back

Potential energy increases with height; the higher an object is, the more potential energy it has.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).

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What is an example of kinetic energy in everyday life?

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A moving car, a flowing river, or a flying baseball are all examples of kinetic energy.