TUTORIAL 2 KINEMATICS OF LINEAR MOTION

CHAPTER 1: INTRODUCTION TO PHYSICSS SESSION 20212022

CHAPTER 1: INTRODUCTION TO PHYSICS

1.1 Physics Understanding
a) State basic quantities and their respective SI units:

length (m), time (s), mass (kg), electrical current (A), temperature (K), amount of substance
(mol) and luminosity (cd).
b) State derived quantities (in terms of basic quantities) and their respective units and symbols:
velocity (m s-1), acceleration (m s-2), work (J), force (N), pressure (Pa), energy (J), power
(W) and frequency (Hz).
c) Perform conversion units between SI units.

1.2 Scalars and Vectors
a) Define scalar and vector quantities.
b) Compare scalar and vector quantities
c) Resolve vector into two perpendicular components (x and y axes).
d) Determine resultant vector of two vector component.
e) Write a laboratory report

(Experiment 1: Physical Measurement)

(Experiment 2: Plotting and Interpreting linear graph)

CHAPTER 1: INTRODUCTION TO PHYSICSS SESSION 20212022

OBJECTIVE QUESTIONS

1. The joule (J) expressed in terms of basic units is

A. kg m s-1 C. kg m s-2

B. kg m2 s-1 D. kg m2 s-2

2. Which of the following is INCORRECT:

Physical Quantity Derived Unit Basic Unit

A. Work Nm kg m2 s-2

B. Force N kg m s-2

C. Power J s-1 kg m3 s-3

D. Pressure N m-2 kg m-1 s-2

3. 891 000 milligrams can be written as:
A. 8.91 ×10-1 kilograms
B. 8.91 ×10-2 kilograms
C. 8.91 ×102 kilograms
D. 8.91 ×101 kilograms

4. Change 365.25 days into its SI unit

A. 3.156107 s C. 31.5610−6s

B. 1.315106s D. 1.31510−6s

5. Which of the following is equal to 86.2 cm?

A. 8.62 m C. 8.6210−4 km

B. 0.862 mm D. 862 dm

6. Identify which of the following quantities can be described fully by its magnitude.
A. Force
B. Displacement
C. Energy
D. Acceleration

CHAPTER 1: INTRODUCTION TO PHYSICSS SESSION 20212022

STRUCTURED QUESTIONS

1. (a) State FOUR basic quantities and their respective SI units.

(b) Give the name for each of the following multiples of the meter.

(i) 1 m (ii) 1 m (iii) 1000 m
100 1000

2. (a) Convert the following values into SI unit by showing step by step conversion.

Express your answer in standard form.

(i) 1. 5 × 102 mm2 = __________

(ii) 105 µg = __________

(iii) 10 × 102 mg =__________

(b) Convert the following quantities into SI unit.
(i) 300 km h−1
(ii) 25 g cmˉ3
(iii) 42500 h−1

2. The pressure of a liquid is given by P = ρgh.
Calculate the pressure (in SI unit) if the density of water ρ is 1 g cm–3, the acceleration
due to gravity g is 9.81 m s–2 and the height of water h is 50 cm.

3. (a) Calculate the volume of the cylinder that has a height of 30 cm with diameter of
100 mm. Express it in SI Unit.

(b) The mass of a solid cube is 856 g, and each edge has a length of 5.35 cm. Calculate
the density ρ of the cube in SI units.

4. (a) Distinguish between scalar and vector quantities. Give THREE examples for
each quantity

(b) y

B= 3.7 km

30 40
A= 5.2 km x

FIGURE 1.1

Two vectors A and B are shown in FIGURE 1.1. Determine the
(i) horizontal and vertical components for each displacement.
(ii) magnitude and direction of the resultant displacement.

CHAPTER 1: INTRODUCTION TO PHYSICSS SESSION 20212022

5.
F1

30
F2

FIGURE 1.2

Two forces F1 = 8 N and F2 = 12 N are acting on a wooden block shown in the FIGURE
1.2. Determine the magnitude and direction of the resultant force acting on the wooden
block.