A force-extension graph is straight from the origin to force 5.0 N and extension 0.040 m. A student says the work done stretching the spring equals 5.0×0.040 J.
.1
Calculate the energy actually stored in the spring.
[2 marks]
.2
Explain the error in the student's reasoning.
[2 marks]
5 marksFoundation and HigherRequired practical 196.5.4.1.5 Acceleration6.5.4.2.1 Newton's First Law6.5.4.2.2 Newton's Second Law6.5.4.2.3 Newton's Third Law
AQA Trilogy 8464
Spec and skills
Paper scope: P2
Spec 6.5.4.1.5
Spec 6.5.4.2.1
Spec 6.5.4.2.2
Spec 6.5.4.2.3
Original practice question
Answer and supported method checks
A trolley experiment uses a total moving mass of 0.80 kg. Resultant forces 0.40 N, 0.80 N and 1.20 N produce accelerations 0.50, 1.00 and 1.50 m/s².
.1
Calculate the acceleration predicted for a 1.60 N resultant force.
[2 marks]
.2
Evaluate whether the data support the proposed relationship, and identify one way to make the conclusion more reliable.
[3 marks]
5 marksFoundation and HigherRequired practical 216.6.2.1 Types of electromagnetic waves6.6.2.2 Properties of electromagnetic waves 16.6.2.3 Properties of electromagnetic waves 26.6.2.4 Uses and applications of electromagnetic waves
AQA Trilogy 8464
Spec and skills
Paper scope: P2
Spec 6.6.2.1
Spec 6.6.2.2
Spec 6.6.2.3
Spec 6.6.2.4
Original practice question
Answer and supported method checks
Identical detectors at equal distances from two heated plates record infrared signal after the background reading has been subtracted. Both plates have the same area and temperature. Matt black gives 8.4 units and shiny silver gives 2.1 units.
.1
Calculate how many times larger the black-plate signal is.
[2 marks]
.2
Evaluate whether the measurements support using a shiny surface to reduce thermal radiation losses.
A car has thinking distance 10 m and braking distance 18 m on a dry road. On a wet road at the same initial speed, its thinking distance is still 10 m and braking distance is 30 m.
.1
Calculate the percentage increase in total stopping distance on the wet road.
[3 marks]
.2
Explain why wet conditions increase braking distance in this comparison.
[2 marks]
4 marksHigher6.7.2.2 Fleming's left-hand rule6.7.2.3 Electric motors
AQA Trilogy 8464
Spec and skills
Paper scope: P2
Spec 6.7.2.2
Spec 6.7.2.3
Original practice question
Answer and supported method checks
A wire carries 4.0 A perpendicular to a 0.20 T magnetic field. The length in the field is 0.10 m. In a second test both the current and the field direction are reversed, but their magnitudes are unchanged.
.1
Calculate the magnetic force magnitude in the second test.
[2 marks]
.2
Explain whether the force direction changes in the second test.
