Safe use of appropriate apparatus in a range of contexts to measure energy…

The idea

This practical activity statement asks you to choose and handle apparatus safely so that energy changes and energy transfers can be measured, together with related quantities such as work done. In one context you might use a joulemeter or a power meter to record the electrical energy supplied to a heater and compare it with the temperature rise of a known mass of water. In another you might use a force meter and a metre rule to measure a force and the distance moved along the force, then calculate work done as force × distance. Safety matters throughout: secure hot apparatus, keep leads tidy, avoid overloading circuits and read instruments at eye level. The assessment checks that you select suitable apparatus, use it correctly and record readings with sensible units, not that you memorise a fixed mark scheme.

What earns the marks

• Selects apparatus that matches the energy quantity being measured, such as a joulemeter for electrical energy or a force meter and rule for work done.
• Uses the apparatus safely, for example clamping hot equipment, keeping the circuit within its rating and avoiding contact with heated surfaces.
• Records readings with correct units, distinguishing energy in joules from work done in joules and from temperature change in degrees Celsius.
• Calculates a derived value correctly, such as work done = force × distance moved along the force, and states the unit as the joule.

Common mistakes and how to put them right

• Confuses energy with temperature.

  Put it right: Treat temperature change as evidence of energy transfer rather than as the energy itself.

• Leaves the joulemeter or power meter running between trials.

  Put it right: Reset the meter before each measurement so the reading covers only that transfer.

• Measures distance at an angle to the force.

  Put it right: Measure the distance moved along the line of the applied force when calculating work done.

Exam tips

• Name the specific apparatus and say what quantity it measures before describing the procedure.
• State the safety precaution and the hazard it controls, rather than listing precautions without reasons.
• Give every reading a unit and check that the calculated quantity carries the correct unit.