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Page 17

Physics Module Form 4

Teacher’s Guide Chapter 1 : Introduction To Physics

_________________________________________________________________________________________

17

Part B : Structure Question





1. A car moves with an average speed of 75 km h
-1

from town P to town Q in 2 hours as

shown in Figure 1. By using this information, you may calculate the distance between the

two towns.

P Q






Figure 1

(a) (i) Based on the statements given, state two basic quantities and their respective

SI units.



………………………………………………………………………………………

(ii) State a derived quantity and its SI unit.

………………………………………………………………………………………

(b) Convert the value 1 . m to standard form.

5 x 10
-3








(c) Complete Table 1 by writing the value of each given prefix.

















Table 1

(d) Power is defined as the rate of change of work done. Derive the unit for power in
terms of its basic units.








(e) Calculate the volume of a wooden block with dimension of 7 cm, 5 cm breadth and 12
cm height in m

3
and convert its value in standard form.



















Distance : m and time : s




Speed – m s
-1

= 0.2 x 10
3
m

= 2.0 x 10
2
m







10

-9



10

-6




10
6




10
9







Power =
time

work
=

time

ntdisplacemeForce
Unit =

s

mkgms 
2

= kg m
2
s

-3








Volume = (7 x 10

-2
) (5 x 10

-2
) (12 x 10

-2
)

= 420 x 10
-6


= 4.20 x 10

-4
m

3

Page 18

Physics Module Form 4

Teacher’s Guide Chapter 1 : Introduction To Physics

_________________________________________________________________________________________

18

2. Figure 2 shows an ammeter of 0—3 A range.





















Figure 2



(a) (i) Name component X. ………………………………………………………………...


(ii) What is the function of X? ………………………………………………………….


(b) Table 2 shows three current readings obtained by three students.












Table 2



(i) Did all the students use the ammeter in Figure2? ..………………………………….

(ii) Explain your answer in (b)(i).


………………………………………………………………………………………



3. Figure 3 shows the meniscus of water in a measuring cylinder K, L, and M are three eye

positions while measuring the volume of the water.



(a) (i) Which of the eye positions is

correct while taking the reading of the

volume of water?



…….……………………………………







Figure 3

(b) The water in the measuring cylinder is

replaced with 30 cm
3

of mercury.

(i) In Figure 4, draw the meniscus of the

mercury in the measuring cylinder. Figure 4

(ii) Explain why the shape of the meniscus of mercury is as drawn in (b)(i).



……………………………………………



No




3
rd

readings obtained by student 2 and 3 are out of the meter range.

















L





















The cohesive force is larger than the adhesive force

















Mirror



To avoid parallax error

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