A tired driver is driving fast on a wet road at night.
Explain how each of these factors affects the stopping distance of the car.
[6 marks]Edexcel GCSE Combined Science November 2020 Physics Paper 1F
5 questions on this paper's topics
33:001 of 5
Waves travel across a pond. A floating leaf moves up and down 5 times in 2.0 s. The distance between neighbouring crests is 0.40 m.
.1
Calculate the frequency of the waves.
[1 mark].2
Calculate the speed of the waves.
[2 marks].3
Calculate the period of the waves.
[2 marks].4
The leaf moves up and down but does not travel across the pond with the waves.
Explain what this shows about the waves.
[2 marks]An electric motor in a lift raises the lift through a height of 12 m in 20 s. The mass of the lift is 800 kg.
Gravitational field strength = 9.8 N/kg.
.1
Calculate the energy transferred to the lift's gravitational potential store.
[2 marks].2
Calculate the useful power output of the motor.
[2 marks].3
A second motor raises the same lift through the same height in 30 s.
Explain why the second motor has a lower power output.
[2 marks]Radium-226 decays by emitting an alpha particle:
.1
Determine the mass number A of the radon nucleus.
[1 mark].2
Determine the atomic number Z of the radon nucleus.
[1 mark].3
Strontium-90 decays by beta emission. Describe what happens in the nucleus during beta decay.
[2 marks]The graph shows how the distance travelled by a cyclist changes with time.
.1
Determine the speed of the cyclist during the first 10 s.
[2 marks].2
Describe the motion of the cyclist between 10 s and 20 s.
[1 mark].3
Calculate the average speed of the cyclist for the whole 30 s.
[2 marks]