# Question 1

Various options are provided as possible answers to the following questions. Choose
the answer and write only the letter (A–D) next to the question numbers (1.1–1.10) in
the ANSWER BOOK, for example 1.11 D.

1.1 Which ONE of the following is a vector quantity?

A Force
B Time
C Speed
D Distance (2)

1.2 Which ONE of the following quantities is given with its CORRECT SI unit?

(2)

1.3 An object undergoes constant acceleration.

Constant acceleration means that in equal time intervals:

A Speed of an object is constant
B Velocity of an object is constant
C Velocity of an object changes by the same amount
D Displacement of an object changes by the same amount (2)

1.4 Consider the vector diagram given below.

Which ONE of the following CORRECTLY describes the relationship between
vectors A, B and C?

A A + B + C = 0
B A + B = C
C A + C = B
D B + C = A (2)

1.5 A block of mass m falls vertically down from rest. The block falls for a vertical
distance of 5 m below its initial height (at point Q) as shown in the diagram
below.

When the block reaches point Q, the kinetic energy that it has gained in terms
of m (mass of block) and g (gravitational acceleration) is equal to …

A 0.
B 15 mg.
C 5 mg.
D 20 mg. (2)

1.6 Consider the three velocity-time graphs P, Q and R shown below.

Which ONE(S) of the following velocity-time graphs represent the motion of
an object whose velocity is decreasing uniformly?

A R only
B Q only
C P and Q
D P and R

1.7 The diagram below represents a bar magnet. P, Q, R and S are points at
certain distances from the south pole of the magnet as shown in the diagram
below.

At which point is the magnitude of the magnetic field of the bar magnet the
WEAKEST?

A P
B Q
C R
D S (2)

1.8 Two identical spheres A and B placed on insulated stands, carry charges of
+2 μC and +6 μC, respectively as shown below.

When the spheres are brought into contact, in which direction do electrons
move?

A From A to B
B From B to A
C No movement as both spheres are positively charged
D No movement, electrons remain in A (2)

1.9 The dimensions of four pieces of copper of equal length and the temperature
of each wire are given below.

Which ONE of the four wires will provide the GREATEST resistance to the
flow of charge?

A 5 cm in diameter at 15 °C
B 5 cm in diameter at 85 °C
C 2 cm in diameter at 85 °C
D 2 cm in diameter at 15 °C (2)

1.10 In which ONE of the following do sound waves travel the FASTEST?

A Air
B Liquids
C Solids
D Vacuum (2)