AQA GCSE PHYSICS - ENERGY

Gravitational potential energy is stored when an object is …

• heated

• stretched

• lifted

• accelerated

Which of these statements is true about energy in general?

• Energy can be created

• Energy can be destroyed

• Energy can be defined

• Energy can be transferred

Kinetic energy can be calculated using the equation E_k= ½ mv²

In this equation 'v' is …

• velocity

• energy

• mass

• weight

If the amount a spring is stretched doubles, the elastic potential energy stored will …

• halve

• stay the same

• double

• quadruple

Which of these is NOT a definition of power?

• Rate of doing work

• Rate of energy transfer

• Rate of change of velocity

• Joules transferred per second

Which of these units is the equivalent to thousands of joules?

• millijoules

• megajoules

• microjoules

• kilojoules

To calculate kinetic energy gained using the equation E_k= ½ m v², mass must be in …

• grams

• tonnes

• kilograms

• newtons

Which unit is energy measured in?

• kilograms

• watts

• joules

• newtons

A spring with spring constant 25N/m is stretched 10cm.

Using the equation E_e=½ k e², the stored elastic potential energy is …

• 0.125 J

• 12.5 J

• 25 J

• 1250 J

Which of these processes is NOT reduced by insulation?

• conduction

• distillation

• convection

• radiation