S4 Physics All Topics 2A

The graph shows the speed-time graph of a pendulum bob oscillating from a point. What is the period of the oscillation of the pendulum bob?

• 5 s

• 1.0 s

• 1.5 s

• 2.0 s

A car travels at constant speed round a bend. Which of the following statements about the motion of the car is not correct?

• The car is accelerating.

• The velocity of the car is uniform.

• The displacement of the car increases.

• The distance covered per unit time by the car is constant.

A stone is thrown vertically upwards and falls back to its starting point and stops. Taking velocity in the upward direction as positive, which of the following velocity-time (v-t) graphs is correct?

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Some students want to calculate the density of pure copper. They measured the mass and volume of different samples of pure copper. Which of the following mass-volume graphs shows their results?

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A rocket has a mass of 100 kg. The force produced by the engine of the rocket is 3000 N in the direction against the force of gravity.

What is the acceleration of the rocket? Take gravitational field strength as 10 N/kg.

• 10 ms^-2

• 20 ms^-2

• 30 ms^-2

• 40 ms^-2

An aircraft heads north-east at 400 km/h. The wind is blowing towards the north-west at 100 km/h. Which vector diagram represents the correct way to obtain the resultant velocity of the aircraft?

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The diagram shows a can of soft drink balanced on its edge. Where is the likely position of the centre of gravity?

• A

• B

• C

• D

A force acts on an L-shaped object pivoted at point P at different positions. Which of the following diagrams shows the position where force F is applied that would result in the lowest magnitude of moment about pivot P?

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A force of 500 N is applied to a box to move it up the ramp as shown. The friction acting on the box is 300 N. How much work is done against friction?

• 300 J

• 1200 J

• 1500 J

• 3000 J

Smoke particles in a transparent box are observed using a microscope. A small point of light is seen to move around as shown. What does this experiment demonstrate about air molecules?

• They are in continuous random motion.

• They can be seen through a microscope.

• They move more quickly when they are heated.

• They move because of collisions with smoke particles.