Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Units (Forces and Motion)
84 practice questions
Practice questions
31–40 of 41 · Normal
Question 31
2 marks · Normal
Answer and see the solution →(a)[2 marks]A force of 12 N acts over a perpendicular distance of 0.4 m. Calculate the moment produced and state its SI unit.
Question 32
2 marks · Normal
Answer and see the solution →(a)[2 marks]A shopping trolley has a mass of 14 kg and is moving at 2 m/s. Calculate its momentum and give the correct SI unit.
Question 33
1 mark · Normal
Answer and see the solution →Which of the following has the correct SI unit and symbol for force?
- A.joule (J)
- B.newton (N)
- C.kilogram (kg)
- D.watt (W)
Question 34
4 marks · Normal
Answer and see the solution →A cyclist travels 200 metres in 25 seconds.
(a)[3 marks]What is the average speed of the cyclist? Give the correct unit and symbol.
(b)[1 mark]Name the SI base unit for time, including its symbol.
Question 35
1 mark · Normal
Answer and see the solution →Which of these is the correct SI unit for momentum?
- A.kilogram metre/second (kg m/s)
- B.newton metre (N m)
- C.metre per second squared (m/s²)
- D.joule (J)
Question 36
3 marks · Normal
Answer and see the solution →An object experiences a force of 15 newtons (N) over an area of 3 m².
(a)[2 marks]Calculate the pressure exerted (pressure = force ÷ area) and give its SI unit and symbol.
(b)[1 mark]Is the pressure unit one of the base units listed for Forces and Motion in this syllabus? Explain briefly.
Question 37
3 marks · Normal
Answer and see the solution →A turning force (moment) of 7.5 newton metre (N m) is applied to a door to open it.
(a)[1 mark]Name the physical quantity measured in newton metre, including its unit symbol.
(b)[2 marks]A student gives the answer "joule (J)" for a question asking about moments. Explain why this is incorrect, based on SI units in Forces and Motion.
Question 38
2 marks · Normal
Answer and see the solution →Give the SI unit and symbol for gravitational field strength, and explain briefly what this quantity measures.
Question 39
3 marks · Normal
Answer and see the solution →For each of the following physical quantities, state their SI unit (name and symbol) clearly:
(a)[1 mark]Acceleration
(b)[1 mark]Force
(c)[1 mark]Turning effect (moment of a force)
Question 40
2 marks · Normal
Answer and see the solution →Explain why it is important to use SI units such as kilogram, metre, and second when carrying out calculations in Physics.