The increase from the original length of a spring when it is stretched.

The stretch of a spring that returns to its original shape when the stretching force is removed.

The stretch of a spring as it is permanently stretched out of shape.

The largest extension of a spring before it is stretched out of shape.

Stretching a spring practical

Physics

Work done (W = F × s)

Power (P = W ÷ t)

Efficiency (in terms of useful output energy transfer)

Calculating the energy of a moving object (E=1/2mv2)

The energy of an object in a gravitational field (E=mgh)

Calculating energy changes (E)

Stretching a spring analysis (F=kx)

Calculating the energy of a spring (E = 1/2 kx²)

In the Forces make things change unit, they will build on this knowledge to learn how to combine forces in two dimensions, how to calculate acceleration from a resultant force and how to calculate forces in collisions and explosions.

In the Measuring and calculating motion unit, pupils learnt how to measure and calculate velocity and acceleration, and how to interpret displacement-time and velocity-time graphs. 

This unit covers energy changes in systems through heating, forces, and electrical work. It includes energy storage, efficiency, and transfer methods like insulation. Emphasis is on calculating energy, conducting experiments, interpreting data, and communicating findings accurately.

Energy of moving objects

Physical activity and equipment requiring safe use

the difference between the spring's stretched and unstretched length

a reversible (temporary) change in length of a spring

Match the following terms to their definitions (for a spring).

The diagram shown is of a spring in its unstretched state and when it is stretched. 
Which arrow, A, B, C, or D, shows the extension of the stretched spring?

The limit of proportionality of a spring is the largest possible extension before the spring …

The following graph shows the extension of a spring against the stretching force. 
Which point, A, B, or C, shows the position of the limit of proportionality?

Use a set square to avoid parallax error.

Put padding on the floor under the mass holder.

A pupil investigates how the extension of a spring varies with the force stretching it. 
Which of the following safety precautions are necessary for this investigation?

A spring has extension of 4 cm when it experiences a stretching force of 5 N. 
If the spring does not reach its limit of proportionality, the extension is {{}} cm when the stretching force is 15 N.

The energy an object has because it is moving is in the {{}} energy store.

The energy an object has because it is stretched or squashed is in the {{}} energy store.

Friction or air resistance can cause energy to {{}} into the surroundings.

An object hangs from a rope. 
Which of the follwoing is equal to the force exerted on the rope by the object?

An object has mass 5 kg. 
Which of following is closest to the weight of the object?

The following graphs plot variable 1 on the $$x$$–axis and variable 2 on the $$y$$–axis. 
On which graph is variable 1 directly proportional to variable 2?

Stretching a spring practical

Lesson outcome

Content guidance