Work done and energy

Work done

Energy is transferred from one store to another and force causes the object to move

Work done equation

Force x distance (J)

Kinetic energy

If work has been done on an object then there was kinetic energy as the energy is turned kinetic - work done=kinetic energy

Kinetic energy equation

0.5 x mass x velocity squared

Gravitational potential energy

When an object has been lifted then work has been done against gravity and the object gains gravitational potential energy

Gravitational potential energy equation

Mass x gravity x height (J)

What does doing ‘work’ mean?

Energy is transferred to it

Energy transferred

You cannot create or destroy energy, you can only change it from one type to another

Hookes law

Elastic potential energy is stored in a stretched/squashed spring

Elastic potential energy equation

0.5 x force x extension