PHYSICS (P1) 2021 May/June Exam Practice Activity 

QUESTION 1: MULTIPLE-CHOICE QUESTIONS
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 to 1.10) in
the ANSWER BOOK, e.g. 1.11 E.
1.1
A constant net force acts on an object moving in a straight line. Which ONE of
the following quantities associated with the object will remain constant during
the motion?

1.2
The weight of an object on the surface of the Earth is w. What will be the
weight of the object on the surface of another planet of the SAME mass as
that of the Earth, but TWICE the radius of the Earth?

1.3
The diagram below shows a cricket player moving his hands downwards from
position 1 to 2 to 3 while catching a ball.

Which ONE of the following statements CORRECTLY explains why the
cricket player moves his hands downwards?

1.4
Consider the motion of a small stone thrown vertically upwards until it reaches
its maximum height.
Ignore the effects of friction.
Which ONE of the following combinations of graphs CORRECTLY shows how
the momentum p and the gravitational potential energy U of the stone change
with time?

1.5
A boy and a girl, having DIFFERENT masses, are initially at rest at point P.
They slide down different paths of a water slide, as shown in the diagram
below.
Ignore the effects of friction.

Consider the statements below regarding the boy and the girl:
I Only conservative forces act on both the boy and the girl while they are
sliding downwards.
II The boy and the girl each have the same gravitational potential energy
at point P.
III On reaching point Q, the speed of the girl is equal to that of the boy.

Which of the above statements is/are CORRECT?

1.6
An astronomer observes that the light spectrum of a star has been blue
shifted.
How have the observed frequency of light from the star and the distance
between the star and Earth changed?

1.7

1.8
Consider the statements below regarding AC power and DC power:
I AC voltage can be changed during AC power transmission.
II DC power transmission requires transformers.
III AC power transmission is more energy efficient.
Which of the above statement(s) is/are CORRECT?

1.9
In the circuit diagram below, all resistors are IDENTICAL. Ignore the internal
resistance of the cell and the resistance of the connecting wires.

When switch S is CLOSED, the reading on voltmeter V1 is 3 V.
What will be the reading on voltmeter V2?

1.10
Some of the energy levels of an atom are represented in the diagram below

E0 represents the ground state energy.
Which ONE of the energy transitions below represents the absorption of light
of the lowest frequency by the atom?