# Energy > gravitational energy

How the vertical position of a brick determines how much energy there is in a gravitational store

A simple analogy that could be used with small groups or with individual students finding it difficult to understand the concept of gravitational potential energy ('uphill' energy).

The simple pendulum used as a stimulus to discuss energy transfers.

Roll a ball on a curved track to explain Galileo's idea, which in turn led to Newton's First Law of Motion.

Using a dynamics trolley on a steep ramp, where the energy transfer is not easily measured.

Measuring the gravitational potential energy transferred to kinetic (motion) energy with a dynamics trolley.

To move along a horizontal plane there is no net transfer of energy from potential energy to kinetic (motion) energy.

The transfer of energy through an electric motor to potential energy of a load.

When a pendulum is displaced, it gains gravitational potential energy due to its increased height. When subsequently released, this energy becomes transferred to kinetic energy. This datalogging experiment explores the relationship between these changes of energy.

Friction spoils the downhill and uphill experiment of a rolling ball on a curved track. This is Galileo's almost frictionless version of it.

Students measure their personal power by running up a flight of stairs.