Work, PE and KE

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy is the energy an object possesses due to its motion, calculated using the formula KE = 0.5 × mass × velocity².

Front

How can you increase Kinetic Energy?

Back

You can increase Kinetic Energy by increasing the speed (velocity) of the object.

Front

What is Potential Energy (PE)?

Back

Potential Energy is the energy stored in an object due to its position or state, such as height above the ground.

Front

What is Mechanical Energy?

Back

Mechanical Energy is the sum of potential energy and kinetic energy in a system.

Front

What is the formula for calculating Kinetic Energy?

Back

KE = 0.5 × mass × velocity².

Front

How do you calculate the Kinetic Energy of an object with a mass of 15 kg moving at 7 m/s?

Back

KE = 0.5 × 15 kg × (7 m/s)² = 367.5 J.

Front

What is Gravitational Potential Energy (GPE)?

Back

Gravitational Potential Energy is the energy an object has due to its height above the ground, calculated as GPE = mass × gravity × height.

Front

Which has greater GPE: a 4 kg cat or a 6 kg cat on a 30 m hill?

Back

The 6 kg cat has greater gravitational potential energy.

Front

What is Work in physics?

Back

Work is done when a force causes an object to move in the direction of the force, calculated as Work = force × distance.

Front

Which of the following is an example of work being done?

Back

All of these: A wagon carrying vegetables, a pulley lifting water, and a hammer removing a nail.