Pearson Edexcel International GCSE
Physics — Topic 1 Paper 1
Forces and Motion · specification 1.1, 1.3–1.24
Time allowed: 30 minutes
Total marks: 25
Candidate name:
Centre / class:
Answer all questions. You may use a calculator. Take $g = 10\,\text{N/kg}$. Show your working.
1
The velocity–time graph shows the motion of a runner on a straight track.
(a) Calculate the acceleration of the runner between $0$ and $4.0\,\text{s}$.
[2]
(b) Calculate the total distance travelled by the runner in $14\,\text{s}$.
[4]
(Total for Question 1 = 6 marks)
2
A car of mass $1200\,\text{kg}$ travels in a straight line. The driving force is $3600\,\text{N}$ and the total resistive force is $1200\,\text{N}$.
(a) Calculate the resultant force on the car.
[2]
(b) Calculate the acceleration of the car.
[2]
(c) The driver sees a hazard. The thinking distance is $12\,\text{m}$ and the braking distance is $36\,\text{m}$.
(i) State the stopping distance of the car.
[1]
(ii) The road is wet. Explain what happens to the stopping distance. Refer to thinking distance and braking distance.
[2]
(Total for Question 2 = 7 marks)
3
A skydiver jumps from an aircraft and falls towards the Earth. After some time she reaches terminal velocity.
(a) Name the two forces that act on the skydiver as she falls.
[2]
(b) Explain, in terms of the forces acting, why the skydiver reaches a terminal velocity.
[4]
(Total for Question 3 = 6 marks)
4
A student investigates how the extension of a helical spring varies with the applied force.
(a) Describe a method the student could use to obtain the data needed to plot a graph of force against extension.
[3]
(b) The table shows some of the student’s results.
| Force / N | 0 | 2.0 | 4.0 | 6.0 | 8.0 |
|---|---|---|---|---|---|
| Extension / cm | 0 | 2.5 | 5.0 | 7.5 | 12.0 |
(i) State whether the spring obeys Hooke’s law between $0$ and $6.0\,\text{N}$. Use the data to explain your answer.
[2]
(ii) Suggest why the $8.0\,\text{N}$ result does not fit the same pattern.
[1]
(Total for Question 4 = 6 marks)
END OF PAPER 1