A manufacturer claims a rubber luggage strap is more suitable than a steel spring for repeated stretching under load. A fair comparison must use the same maximum applied force and check whether each sample returns to its original length.
Plan an investigation to compare how extension depends on force for the strap and spring, and test whether they recover their original lengths after repeated loading.
[6 marks]
5 marksFoundation and Higher
Spec and skills
Original practice question
Answer and supported method checks
A student builds a circuit with a 9.0 V supply, a 10 Ω resistor and a 20 Ω resistor in series. The ammeter reads 0.30 A. The student writes: “The 20 Ω resistor uses twice as much current as the 10 Ω resistor.”
.1
Calculate the potential difference across the 10 Ω resistor.
[2 marks]
.2
Evaluate the statement using current conservation and energy transfer.
[3 marks]
6 marksFoundation and Higher
Spec and skills
Original practice question
Answer and supported method checks
A parachutist has reached a first terminal velocity before opening a parachute. Consider the motion from just before opening until a new terminal velocity is reached.
Explain the changes in resultant force, acceleration and speed throughout this sequence.
[6 marks]
6 marksFoundation and Higher
Spec and skills
Original practice question
Answer and supported method checks
A student must determine the density of an irregular metal nut that sinks in water and does not dissolve. The nut fits fully inside a measuring cylinder.
Plan a method that measures density and controls the main measurement errors.
[6 marks]
6 marksHigher
Spec and skills
Original practice question
Answer and supported method checks
A simple motor has a rectangular current-carrying coil between two magnet poles. A student suggests increasing current, using stronger magnets and making the active sides parallel to the magnetic field to increase rotation.
Evaluate these suggestions using the motor effect. Explain the role of the two sides of the coil.
