Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, for example 1.11 E.
1.1 Four forces act on a point, as indicated in the diagram.
The magnitudes of the components of the resultant (net) force in the horizontal (Fx) and vertical (Fy) directions are …
A Fx = 3 N and Fy = 6 N.
B Fx = 1 N and Fy = 4 N.
C Fx = 2 N and Fy = 2 N.
D Fx = 4 N and Fy = 2 N. (2)
1.2 A lawnmower is pushed across the ground with a force of F at an angle of θ
with the horizontal. The weight of the lawnmower is w.
The normal force, in N, on the lawnmower is …
A w
B w + Fy
C w – Fy
D w + Fx (2)
1.3 A car is travelling along a road. The driver has his seat belt on. The driver sees an obstruction in the road ahead and suddenly applies the brakes.
An action-reaction pair is the force of the seat belt on the driver and the force of the …
A driver on the seat.
B wheels on the road.
C driver on the seat belt.
D seat belt on the seat. (2)
1.4 Planet X has a mass twice the mass of the Earth and a radius one and a half times that of the Earth. If the acceleration due to gravity on the Earth is g, then the gravitational acceleration on planet X will be …
1.5 A light ray travels from medium A to medium B. Medium B has a lower refractive index than medium A.
The critical angle for medium A in terms of medium B is 42°.
Which ONE of the sketches below represents the CORRECT path of the light ray?
1.6 The ability of a wave to spread out in wave fronts as the wave passes around a sharp edge, is known as …
A Snell’s law.
B total internal reflection.
C diffraction.
D Huygens’ principle. (2)
1.7 Which ONE of the graphs below represents the correct relationship between force F on a charge and the electric field E?
1.8 A negative charge Q is placed at a distance of 5d from another charge R.
If the net electric field at point P, at a distance of 2d from R, is ZERO, which ONE of the following combinations concerning the ratio of the charges Q and R and the charge on R, is CORRECT?
1.9 In which ONE of the sketches below is the induced polarity of the coil CORRECTLY indicated?
1.10 The potential difference of the battery in the circuit below is 12 V. The internal resistance of the battery is negligible. Two voltmeters, V1 and V2, are connected to the circuit, as shown in the diagram.
When the switch is open, the correct readings on V1 and V2 will be as follows:
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