Measurement | Gemala Quest

Section A · Quantities and units 20 marks

1. Which is a base quantity?[2]

A. ForceB. Electric currentC. VelocityD. Energy

2. Name the SI unit of mass.[2]

3. The newton written in base units is:[2]

A. kg m s⁻²B. kg m² s⁻²C. kg m s⁻¹D. kg s⁻²

4. Convert 5.2 km to metres.[2]

5. Convert 350 mA to amperes.[2]

6. Which is a vector quantity?[2]

A. SpeedB. MassC. DisplacementD. Temperature

7. Convert 4.8 × 10³ g to kilograms.[2]

8. The prefix nano (n) means:[2]

A. 10⁻³B. 10⁻⁶C. 10⁻⁹D. 10⁻¹²

9. Name the SI unit of temperature.[2]

10. Which is a scalar quantity?[2]

A. ForceB. AccelerationC. WorkD. Momentum

Section B · Analysing an experiment 35 marks

A student investigates a simple pendulum. Length l (cm): 20, 40, 60, 80, 100. Period squared T² (s²): 0.80, 1.60, 2.40, 3.20, 4.00.

11. What is the manipulated variable?[2]

A. LengthB. PeriodC. Mass of bobD. Amplitude

12. What is the responding variable?[2]

A. LengthB. PeriodC. Mass of bobD. Room temperature

13. Which should be kept constant?[2]

A. LengthB. Period squaredC. Mass of the pendulum bobD. Time

14. Find the gradient of the graph of T² against l, in s² cm⁻¹.[3]

15. Find T² when l = 50 cm.[2]

16. State the relationship between T² and l.[2]

17. T² = (4π²/g) l. With l in metres, the gradient is 4 s² m⁻¹. Find g to 3 significant figures.[3]

18. Kinetic energy (½mv²) in base units is:[2]

A. kg m s⁻¹B. kg m² s⁻²C. kg m s⁻²D. kg² m s⁻¹

19. Pressure (force ÷ area) in base units is:[3]

A. kg m⁻¹ s⁻²B. kg m s⁻²C. kg m⁻² s⁻¹D. kg m² s⁻²

20. 0.000 47 m = 4.7 × 10ᵏ m. Find k.[2]

21. 6 400 000 m = 6.4 × 10ᵏ m. Find k.[2]

22. Explain the difference between accuracy and precision. Give an example.[4]

23. State two ways to reduce random error when measuring the period of a pendulum.[4]

24. A stopwatch records 20 oscillations in 18.0 s. Find the period in seconds.[2]

Section C · Investigation 45 marks

A spring is loaded. Load (N): 1, 2, 3, 4, 5. Extension (cm): 1.5, 3.0, 4.5, 6.0, 7.5.

25. Write a hypothesis for this experiment.[3]

26. Find the spring constant in N m⁻¹, to 1 decimal place.[3]

27. Find the extension in cm for a load of 3.6 N.[2]

28. Find the load in N for an extension of 9 cm.[2]

29. State one precaution for this experiment.[2]

30. Show that v² = u² + 2as is consistent in units.[4]

31. T = 2π√(l/g). Explain which graph to plot to get a straight line, and how to find g from its gradient.[5]

32. Convert 72 km h⁻¹ to m s⁻¹.[3]

33. Convert 2.7 g cm⁻³ to kg m⁻³.[3]

34. Plan an experiment to investigate how the length of a simple pendulum affects its period. Include the aim, variables, apparatus, procedure, a results table and how you will analyse the data.[10]

35. A ruler has a zero error of +0.2 cm. It reads 5.2 cm. Find the actual length in cm.[2]

36. Parallax error is an example of:[2]

A. Systematic errorB. Random errorC. Zero errorD. Calibration error

37. A 135 g stone raises the water level in a measuring cylinder from 30 cm³ to 50 cm³. Find its density in g cm⁻³.[4]