5116 Prelim P1 Bbss 2009

bbss/2009/Prelim/Sec4E5N/Sc(Phy/Chem)5116/P1 1.

The diagrams show a simple pendulum at the ends and centre of its swing. Which labelled arrow shows the distance moved by the pendulum during one period?

2.

A stone is falling through the air. The acceleration of free fall is 10m/s2. Ignoring air resistance, what happens to the stone each second during its fall? A

The acceleration of the stone increases by 2

10 m/s . B

The speed of the stone increases by 10 m/s.

C D 3.

The stone travels a distance of 10 m. The stone travels at a speed of 10 m/s.

A block of mass 20 kg is pushed along a road with a force of 30 N. The frictional force is 10 N.

What is the acceleration of the block? A B C D

0.67 m/s2 1.0 m/s2 1.5 m/s2 2.0 m/s2

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4.

The diagram shows four shapes, cut from the same piece of card. Which shape has its centre of gravity nearest to the base line?

5.

A boy is trapped in a large area of very soft mud. A man rescues the boy by crawling across a long, light board rather than by walking into the mud. What effect, if any, does the board have on the forces and the pressure on the mud, compared with walking on the mud? force decreased decreased unchanged unchanged

A B C D

pressure decreased unchanged decreased unchanged

6.

The diagram shows a curved track. A ball is released at point A. At which point does the ball have the maximum gravitational potential energy?

7.

An electric motor can lift a weight of 2000 N through a vertical height of 10 m in 20 s. What is the power of the motor? A B C D

10 W 1 000 W 4 000 W 400 000 W

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8.

The diagram shows ice cubes being used to lower the temperature of a drink.

What is the main process(es) by which the liquid at the bottom of the glass cools? A B C D 9.

conduction convection radiation radiation and conduction

Two identical metal plates are painted, one matt white and the other matt black. These are placed at equal distances from a radiant heater as shown in the diagram. The heater is turned on for five minutes.

Which metal plate absorbs more energy and which plate emits more energy in this time?

A B C D

absorbs more black black white white

emits more black white black white

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10. Some ice is placed in a beaker and is heated. The graph shows the temperature of the beaker and its contents during the experiment.

Between which two points on the graph does the beaker contain a mixture of liquid and gas? A C W and X

Y and Z B X and Y D V and W

11. The diagram shows a patient having her eyes tested. A chart with the letters on it is placed behind her and she sees the chart reflected in a plane mirror.

What is the distance between the image of the chart and the image of the patient? A 2m C 5m

B 3m D 7m

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bbss/2009/Prelim/Sec4E5N/Sc(Phy/Chem)5116/P1

12. The diagram shows the action of a magnifying glass. Which point is the principal focus of the lens?

13. A sonic 'tape measure' is used to measure the length of a room. It measures a time interval of 0.060 s between transmitting a sound pulse and receiving the echo. The speed of sound in air is 330 m/s. How far is the reflecting wall from the 'tape measure'? A 5.5 m B 9.9 m C 11 m D 20 m 14. Which diagram correctly shows the directions of the electrostatic forces on a pair of charged spheres?

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15. The diagram shows a battery with an electromotive force of 6 V in a circuit.

How much energy is needed to drive 30 C of charge round the circuit? A 0.2 J C 24 J

B 5J D 180 J

16. The diagram shows a 6.0 V battery connected to two resistors in parallel.

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Which row shows the currents, in amperes, in the three ammeters? A1

A2

A3

A

1.0

1.0

1.0

B

1.0

3.0

1.5

C

4.5

1.5

3.0

D

4.5

3.0

1.5

17. The circuit diagrams show identical pieces of resistance wire X connected to the same cell in different ways. In which circuit will the cell dissipate the most current?

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18. A plug is wrongly wired as shown. It is connected to an old vacuum cleaner which has a metal case .

What would be the effect of using the plug wired in this way? A B C D

The fuse in the plug would blow. The metal case would be live. The neutral wire would melt. The vacuum cleaner would catch fire.

19. The diagram shows a 12 V d.c. power supply, connected across a coil of wire, with a metal core.

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The core becomes a strong magnet when the current is switched on. It remains a magnet after the current is switched off. Which metal is the core made of? A B C D

aluminium copper soft iron steel

20. Two bar magnets are placed near each other with their poles as shown. A student plots the resultant magnetic field with a compass. The Earth’s magnetic field can be ignored. At which point does the compass point towards the top of the page?

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