1. WORKSHEET CHAPTER 1.
PHYSICAL QUANTITIES, UNITS and MEASUREMENT
A. Base Quantities, SI Units and Prefixes
1. Tree common base quantities are…..
A. Length, mass, area C. Area, volume, time.
B. Time, mass, density. D. Length, mass, time
2. Which of the following is NOT base unit ?
A. kg C. N
B. s D. m
3. A µm is…..
A. 0.000 000 001 C. 0.000 001 m
B. 0.0001 m D. 0.1 m
4. The SI unit for termperatur is …..
A. K C. O
K
B. O
C D. C
5. State five base quantities and their SI units and write the symbol for each of the SI unit by
completing the table below.
Base Quantity SI Unit Symbol for SI Unit
1
2
3
4
5
6. Arrange the units given below in their respective columb, beginning with the smallest unit.
km, µg, nm, kg, µs, ms, s, mg, ns, g, Gs, dm, Mg, mm
Mass Length Time
7. (a) The moon is 384 000 000 m away from the Earth. Which prefixe is suitable to represent such
large number ?
…………………………………………………………………………………………………………………………………………………….
8. (b) the file size of a 3-D screen saver is 55 392 bytes. Which prefix is suitable to represent such large
number ?
…………………………………………………………………………………………………………………………………………………….

2. B. Length Measurement
1. Which instruments are most suitable for accurate measurements of the thickness of an Ez-link card
and the diameter of a tennis ball?
Thickness of Ez-link card Diameter of a tennis ball
A. Plastic ruler Vernier calipers
B. Micrometers Plastic ruler
C. Micrometers Vernier calipers
D. Vernier calipers Micrometers
2. Which of thw following best describes the accuracy of each instrument below?
Micrometer Ruler Vernier calipers
A. 0.01 cm 0.01 cm 0.01 cm
B. 0.01 cm 0.1 cm 0.01 cm
C. 0.01 cm 0.1 cm 0.001 cm
D. 0.001 cm 0.1 cm 0.01 cm
3. Ujang uses a micrometer to measure tha thickness of 20 sheet of paper. In order to ensure firm grip,
she should…..
A. Genty turn the thimble until a click sound is heard
B. Firmly twist the thimble until the object does not fall off from between the anvil and spindle.
C. Genty turn the ratchet until a click sound is heard
D. Firmly twist the ratchet until the datum line coincide with the thimble scale
4. Five ball bearings are arranged by the side of the ruler, with two set squares at either ends of the ball
bearings
The radius of one ball bearing is about…..
A. 0.3 cm C. 0.9 cm
B. 1.8 cm D. 3.3 cm
5. Joko uses a plastic ruler to measure the length of the pencil, as shown in the diagram below.
What is the length of the pencil?
A. 2.1 cm C. 2.2 cm
B. 11.1 cm D. 11.2 cm

3. 6. The diagram below shows a ball bearing being measured using a micrometer.
What is the diameter of the ball bearing?
A. 2.25 mm C. 2.75 mm
B. 2.75 mm D. 3.75 mm
7. Which of the following statements is NOT TRUE of a micrometer screw gauge?
A. It has accuracy of 0.01 mm
B. It can be used to measure the thickness of your hair.
C. It can be used to measure diameter of netball
D. Rachet knob should be used to tighten the object between the spindle an anvil
8. The diagram shows a small platic ball sandwich between the jaws of the vernier caliper. What is the
diameter?
A. 7.7 mm C. 7.9 mm
B. 7.8 mm D. 8.8 mm
9. Asep is required to determine the thickness of a ream of 500 sheets of A4 size printing paper. He is
supplied with a micrometer, apair of vernier calipers and plastic ruler.
(a) (i) Suggest the instrument tha is most suitablefrom him to measure the thickness of a ream of paper.
……………………………………………………………………………………………………………………………………………………….
(ii) Explain your choise.
……………………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………………….
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4. (b) Suggest what extra step needs to be taken to find the thickness of a pieceof printing paper.
…………………………………………………………………………………….…………………………………………………………………….
………………………………………………………………………………….……………………………………………………………………….
10. Geri is measuring the average thickness of plastic ruler usig a pair of vernier calipers
(a) Record the thickness of the plastic ruler
…………………………………………………………………………………………………………………………………………………….
(b) Suggest and explain how Geri can increase the accuracy of his measurement to make the
thickness recorded more reliable.
…………………………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………………………….
C. Time measurement (The Pendulum)
1. The SI unit for time is …..
A. week C. hour
B. length D. second
2. Which physical quantity is measure using a stopwatch?
A. current C. length
B. time D. mass
3. The digital stopwatch below displays the time taken for Yudi to run 100 m in the school’s annual
sports championship. How long did he take to complete the race?
A. 13.42 seconds C. 13 minutes 42 seconds
B. 1.3 minutes 42 seconds D. 13 hours and 42 minutes
4. What is the correct reading of the mechanical stopwatch below?
A. 5 minutes 25 seconds
B. 5.25 minutes
C. 25 minutes 5 seconds
D. 25 minutes 6 seconds

5. 5. Wuni is sitting on a swing, happily swinging from the end to the other. If she completes 10 to-and-fro
swings in 25 s, what is the periode of the swing?
A. 1.25 s
B. 1.75 s
C. 2.5 s
D. 25 s
6. (a) The SI unit for time is the………………………………………Its Symbol is…………………………..
(b) 1 second = ………………………………minute. 1 minute = …………………………………..hour
So 1 second = …………………………..Hour
(c) 1 ms=…………………………….s
1 µs =…………………………….s
1 ns =…………………………….s
D. Scalars and Vectors
1. Which of the following correctly indentify the scalar and the vector quantity?
Scalar quantity Vector quantity
A. Force Displacement
B. Displacement Velocity
C. Speed Velocity
D. Speed Mass
2. Mr Yanto is jogging along a track as shown below, from point X to Y, he covers a distance of 40 m,
and along YZ, he covers another distance of 30 m. what is his displacement?
A. 10 m C. 70 m
B. 50 m D. 120 m
3. The diagram shows three force acting on a body. The magnitude of the unbalanced force is…….
A. 1 N C. 14 N
B. 8 N D. 28 N
4. Two force of magnitudes 4 N and 8 N respectively act on an object. Which of the following cannot be
a possible resultant force?
A. 0 N C. 8 N
B. 4 N D. 12 N

6. 5. The diagram shows two horizontal forces P and Q exerted on a ring. Which of the following diagram
best demonstrates the resultant force R ?
6. (a) Force is a vector quantity
Speed, Acceleration, Distance, Mass, Velocity
( b) A wooden block is acted on by 5.0 N and 8.0 N force simulntaneously, such that it accelerates
from rest to the right.
Mark on each diagram below, how the two forces should act in order to produce unbalanced
force of 3.0 N and 13.0 N respectively on the block. Label each force clearly.