Efficiency

Class practical: Comparing the energy stored by two rubber bands.

Practical Activity 14-16

Demonstration: Introducing the concept of conservation of energy and a definition of the joule.

Practical Activity 14-16

Class practical: Considering the energy stored in foodstuffs and the energy demanded by human activity.

Practical Activity 14-16

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

Practical Activity 14-16

Demonstration: To move along a horizontal plane there is no net change to the way energy is stored.

Practical Activity 14-16

Demonstration: Students ‘experience’ forces and reinforce their understanding of force and energy units.

Practical Activity 14-16

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

Practical Activity 14-16

Demonstration: Collisions between trolleys that result in energy being dissipated to the surroundings.

Practical Activity 14-16

Demonstration: An electric motor lifts a load.

Practical Activity 14-16

Including simple sums about energy and power is very important. It introduces the units that are in practical use, without...

Teaching Guidance 14-16

Here you can impart an idea of the relative values of different efficiencies. Having such an idea for different devices and...

Classroom Activity 14-16

Practical measurements and calculations as exemplars to learn from. In this activity a motor is used to lift a load.

Classroom Activity 14-16