Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Units (Forces and Motion)
84 practice questions
Practice questions
1–9 of 9 · Hard
Question 1
3 marks · Hard
Answer and see the solution →The diagram below shows the results of an experiment to measure the movement of a toy truck.
Experiment data: Movement of toy truck Distance travelled (cm) Time taken (ms) 120 400 85 280 (a)[2 marks]Convert the distances and times for both runs to SI base units, giving your answers as decimals with the correct units and symbols.
(b)[1 mark]State the SI base unit and symbol for length and for time.
Question 2
2 marks · Hard
Answer and see the solution →A physics textbook lists a unit as "newton per kilogram". Describe a physical situation where this unit might be used, and write down its symbol. Do not use gravitational field strength as your answer.
Question 3
1 mark · Hard
Answer and check →Which of these quantities is measured in the SI unit newton metre (N m)?
- A.Power
- B.Energy
- C.Moment of a force
- D.Momentum
Question 4
3 marks · Hard
Answer and see the solution →A laboratory uses special scales that output mass readings in grams (g). An object on such a scale measures 6350 g.
(a)[1 mark]Convert this mass into kilograms, giving the correct unit and symbol.
(b)[2 marks]If the object exerts a weight of exactly 62.3 N on the scales, calculate the local gravitational field strength in N/kg (give your answer to 2 decimal places, including the correct unit and symbol).
Question 5
2 marks · Hard
Answer and see the solution →Write the correct SI unit and symbol for acceleration. Then, using SI units, explain what the symbol 'm/s²' means in words.
Question 6
3 marks · Hard
Answer and see the solution →A scientist measures a force of 57 millinewtons (mN) using a digital force meter.
(a)[1 mark]Convert this force reading into newtons (N), using the correct unit symbol.
(b)[2 marks]If this force is applied to an object with a mass of 70 grams, calculate the acceleration produced (to 2 decimal places). Write your answer with the correct SI units.
Question 7
1 mark · Hard
Answer and check →Momentum is measured in which SI unit and symbol?
- A.kilogram metre per second (kg m/s)
- B.newton per second (N/s)
- C.metre per second (m/s)
- D.joule per second (J/s)
Question 8
2 marks · Hard
Answer and see the solution →Write the SI unit and symbol for each of the following: (i) distance, (ii) time, (iii) mass, (iv) force, (v) acceleration, (vi) momentum, and (vii) moment of a force.
Question 9
4 marks · Hard
Answer and see the solution →The table below shows several situations or objects. For each, write the SI unit for the quantity shown, using the correct symbol. An example (row 1) is completed for you.
Physical Quantities and Their SI Units Situation / Object Quantity SI unit (name) SI unit (symbol) A car travels 25 metres in 5 seconds. distance metre m A weight-lifter applies a force to raise a barbell. force A moving hockey puck has momentum. momentum A lever turns about a pivot because of a turning force. moment (of a force) An object accelerates at a certain rate. acceleration Complete only the last four rows of the table.