Grade 12 CAPS NSC Question 01 solutions Physical sciences paper 1 2024 Nov multiple choice.
QUESTION 01
Several forces are acting on a moving object. Which ONE of the following statements is CORRECT when these forces are in equilibrium?
A The velocity of the object is increasing
B The object is moving at a constant velocity
C The kinetic energy of the object is decreasing
D The object has a non-zero acceleration
1.2 A stone thrown vertically downwards from the top of a building takes t seconds to strike the ground. Consider the acceleration-time graph below for the motion of the stone.
The effects of air friction are ignored.
What does the shaded area between 0 and t seconds shown in the graph, represent?
A The final velocity of the area
B The Change I position of the stone
C The constant velocity of the stone
D The change in velocity of the stone
1.3 A ball moving horizontally has constant momentum p and kinetic energy k. The ball collides with a wall and bounces back horizontally. Immediately after the collision, the ball has momentum 1/2 p
The mass of the ball remains constant.
Which one of the following is the kinetic energy of the ball immediately after the collision?
A 1/4 k
B 1/2 k
C 2k
D 4k
1.4 A force F acts on a box as the box moves from rest down a rough incline at a constant acceleration. The force is parallel to the incline, as shown in the diagram below.
Choose the option that CORRECTLY completes the following statement.
The work done by the gravitational force is...the work done by the frictional force and the work done by F.
A equal to the sum of
B less than the sum of
C greater that the sum of
D equal to the difference between
1.5 A ball falling vertically downwards from point A strikes the ground with velocity V and bounces, reaching a maximum height at point B, as shown in the diagram below.
Which ONE of the combinations below is CORRECT for the direction of the impulse on the ball upon striking the ground and the magnitude of the velocity with which the ball leaves the ground.
DIRECTION OF THE IMPULSE ON THE BALL MAGNITUDE OF THE VELOCITY WITH WHICH THE BALL LEAVES THE GROUND
A Upward and Greater than V
B Downward and Greater than V
C Upward and Less than V
D Downward and Less than V
1.6 The absorption spectrum of an element surrounding a moving star is observed on Earth and found to be red shifted.
Which ONE of the following combinations is CORRECT for the movement of the star and the frequency of the observed light on Earth?
MOVEMENT OF STAR FREQUENCY OF OBSERVED LIGHT ON EARTH
A Away from Earth and Decreased
B Towards Earth and Decreased
C Away from Earth and Increased
D Towards Earth and Increased
1.7 Two small identical spheres, each with mass M and charge +Q, are placed in a vertical cylinder. The spheres remain stationary when their centers are r meters apart, as shown in the diagram below. Ignore ALL frictional effects.
Which ONE of the following expressions can be used to CORRECTLY calculate the distance r?
A √((kQ^2)/mg)
B √((km_9)/Q^2 )
C √(Q^2/kmg)
D √(mg/(κQ^2 ))
1.8 The Kilowatt-hour (KWh) is a unit of...
A power
B electric current
C electric energy
D potential difference
1.9 The diagram below shows a simplified electric motor. The rotation of the coil is observed from the battery.
Which ONE of the following statements is CORRECT while the motor is in operation?
The coil and the ...
A Slip rings rotate anti-clockwise
B Slip rings rotate clockwise
C Commutator rotate clockwise
D Commutator rotate anti-clockwise
1.10 Which of the following statements is/are TRUE for the photoelectric effect?
The photoelectric effect demonstrates that:
(i) light has a wave nature
(ii) light has a particle nature
(iii) light energy is quantized
A (i) only
B (ii) only
C (i) and (iii) only
D (ii) and (iii) only
