21. Jenny performs an experiment to measure the acceleration due to gravity (g). The results are presented in the below: (note: timing procedure was done for 20 oscillations)

Time taken for 20

oscillations t(s)

15.5 20.1 23.7 26.9 29.8 32.4

Length l(m) 0.15 0.25 0.35 0.45 0.55 0.65

Time Period T(s) 0.775

T

2 (s2

) 0.60

a. Complete the table above (8 marks)

b. Plot a graph of T2

against l. (10 marks)

c. Determine the gradient of the graph (5 marks)

d. Given that gradient = 39.4/g, determine the acceleration due to gravity g. (4 marks)

22. Complete the following table of Fundamental Quantities: (10 marks)

Quantity Symbol Unit Symbol Measuring Instrument

Time

m

Ampere

K

Meter ruler

23. Describe a method that could be used to determine if changing angle of displacement

would affect the period of oscillation of a simple pendulum. (12 marks)

(Note: you may use a diagram in this section)