Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Forces and Motion
367 practice questions
Topics covered
Practice questions
81–90 of 181 · Normal
Question 81
3 marks · Normal
Answer and see the solution →Explain, using an example, when you would use the equation v^2 = u^2 + 2as instead of the equation v = u + at to solve a problem about an object's motion.
Question 82
6 marks · Normal
Answer and see the solution →A cyclist travels along a straight road. The distance–time graph for her first 10 seconds is shown below.
(a)Distance-time graph for a cyclist. (i)[1 mark]Describe how the cyclist’s speed changes during the time shown.
(ii)[1 mark]Calculate the average speed of the cyclist during the first 8 seconds.
(b)[2 marks]Using your answer to part a(ii), explain whether the cyclist’s average speed is the same as her speed at 10 s.
(c)[2 marks]State whether the graph shows negative, zero, or positive acceleration during the interval 8 s to 10 s. Explain your answer.
Question 83
6 marks · Normal
Answer and see the solution →A student uses a toy car to investigate acceleration down a track. The results are shown in the table.
Measured velocity of the toy car at different times. Time (s) Velocity (m/s) 0.0 0.0 1.0 2.0 2.0 4.0 3.0 6.0 4.0 8.0 (a)[2 marks]Plot a velocity–time graph for the results above. Label each axis.
(b)[2 marks]Determine the gradient of the velocity–time graph. State what this gradient represents.
(c)[2 marks]Calculate the distance travelled by the car in the first 4 seconds using your graph or the area method.
Question 84
5 marks · Normal
Answer and see the solution →A car starts at rest, accelerates uniformly to a speed of 20 m/s in 4 seconds, then travels at constant speed for 6 seconds.
(a)[2 marks]Draw a labelled velocity–time graph for the motion of the car from 0 to 10 seconds.
(b)[1 mark]Calculate the acceleration during the first 4 seconds.
(c)[2 marks]Calculate the total distance travelled in the 10 seconds.
Question 85
6 marks · Normal
Answer and see the solution →The table shows the motion of a ball thrown vertically upwards. Air resistance is negligible.
Time (s) Velocity (m/s) 0.0 24.0 1.0 14.2 2.0 4.4 3.0 -5.4 4.0 -15.2 (a)[2 marks]Plot the velocity–time graph for the ball using the data given. Label both axes.
(b)[2 marks]Determine the acceleration acting on the ball.
(c)[2 marks]Calculate the distance the ball travels in the first 2 seconds.
Question 86
6 marks · Normal
Answer and see the solution →A car is initially travelling at 15 m/s. It accelerates uniformly at 4 m/s² for a certain time.
(a)[1 mark]Calculate the velocity of the car after 3 seconds.
(b)[2 marks]Calculate the distance the car travels during these 3 seconds.
(c)[2 marks]Sketch a velocity–time graph for the motion described above. Include numerical values for axes.
(d)[1 mark]Explain the physical meaning of the gradient and the area under the graph you have drawn.
Question 87
4 marks · Normal
Answer and see the solution →A cyclist is riding along a straight, level road. The diagram shows the horizontal forces acting on the cyclist and bicycle:
Diagram showing two forces acting horizontally on a bicycle (left: forward force from cyclist, right: friction from road) (a)[2 marks]Calculate the resultant force acting on the cyclist and bicycle.
(b)[2 marks]State what happens to the motion of the cyclist as a result of this resultant force.
Question 88
1 mark · Normal
Answer and check →Which of the following is a scalar quantity?
- A.distance
- B.velocity
- C.force
- D.acceleration
Question 89
2 marks · Normal
Answer and see the solution →Explain why friction is sometimes useful and sometimes a problem in everyday life. Refer to one example of each.
Question 90
2 marks · Normal
Answer and see the solution →State two effects a force can have on an object.