Measurement

Question 7:Figure 4 shows the reading on a mechanical stopwatch at the start and the end of an experiment. The mechanical stopwatch is used to measure the time taken for 20 complete oscillations of a simple pendulum of length, l.(a) (i) What is the time taken for the pendulum to make 20 complete oscillations?(ii) Why … Read more

Question 4:Encik Ahmad measured the time taken by five pupils in a 400 m run. Table 2 shows the recorded time.(a) Complete the table by calculating the speed of the five pupils. (b) Suggest an appropriate device that Encik Ahmad can use in this situation. (c) Based on the data in Table 2, which pupil … Read more

Question 1:(a) State seven base quantities and their S.I. units.(b) Power, P can be defi ned using the formula,$$ P=\frac{\text { Force × Length }}{\text { Time }} $$Derive the unit for P in terms of S.I. base units. Answer:(a)(b) kg m2 s-3 Question 2:Figure 1 shows a graph of speed, v against time, t … Read more

Question 1:Graphs play an important role in scientific investigations.(a) What are the uses of graphs? (b) Explain the main steps taken in the process of plotting a graph. Answer:(a)– To interpret the relationship between two given variables.– To determine the physical quantities represented by the gradient of the graph.– To determine the physical quantities represented … Read more

Question 1:Figure 1.6 shows Encik Fendi taking a measurement of Wei Li. (a) State the measured physical quantity.(b) What is the measured base unit, symbol of the unit, magnitude of the physical quantity and symbol of the physical quantity in the situation shown in Figure 1.6? Answer:(a) The measured physical quantity is length.(b)Base unit: metreSymbol … Read more