0654_2017__ON_QP_12_Phys

28. Which graph represents the motion of an object that is accelerating?

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29. The scale diagram shows three identical solid blocks P, Q and R. The blocks have different areas

of contact with the ground.

Which block exerts the greatest pressure on the ground?

• block P

• block Q

• block R

• they all exert the same pressure

30. The diagram shows a solid rectangular block made of material of density 2.0 g / cm^3.

• 2.0 g

• 6.0 g

• 14 g

• 24 g

31.A worker carries bricks up a ladder.

The following quantities are known.

● the height the bricks are lifted up

● the time taken for the worker to lift the bricks

● the volume of the bricks

● the weight of the bricks

Which quantities are needed to calculate the useful power produced by the worker as he carries

the bricks up the ladder?

• height, time and volume

• height, time and weight

• height, volume and weight

• time, volume and weight

32. A convector heater is fixed to a wall.

Which diagram shows how warm air near the heater moves because of convection in the air?

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33. The diagram shows the direction of a wave that passes a particle. The particle is made to vibrate

by the wave. The direction of vibration of the particle is shown.

Which row states the type of wave that passes the particle, and gives an example of this type of

wave?

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34. The diagram represents a converging lens forming an image of an object.

Which distance is the focal length of the lens?

• PQ

• PR

• QR

• QS

35. Which type of electromagnetic wave is emitted by a television remote controller?

• infra-red

• radio

• visible light

• X-rays

36. A student claps his hands once when standing 100 m away from a large wall.

The speed of sound in air is 330 m / s.

How long after clapping does the student hear an echo?

• 0.30 s

• 0.61 s

• 1.7 s

• 3.3 s

37. A battery of e.m.f. V is connected across a resistor of resistance R. There is a current in the

resistor.

Which row shows two changes that both increase the current in the resistor?

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