0625_w17_qp_33
A paper of Physics, 0625
Questions:
12
Year:
2017
Paper:
3
Variant:
3
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1
A student determines the speed of three cars on a straight road. The student measured the time for the cars to travel 50 m. The table shows the measurements. car distance travelled / m time taken / s A 3.2 B 4.0 C 3.6 Without calculation, identify the fastest car and the slowest car. Complete the table. car the fastest car the slowest car Calculate the speed of car B. speed = m / s Estimate the time, in minutes, for car C to travel 5000 m. estimated time = minutes Explain why your answer in may not be the same as the actual time taken for the car to travel 5000 m.
1. Motion, forces and energy  →  1.2. Motion
3. Waves  →  3.4. Sound
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3
shows a large box with a heavy lid. The weight of the box is 2250 N. Calculate the mass of the box. mass = kg A man wants to lift the lid of the box. He puts a strong metal bar between the box and the lid. He applies a force to the bar as shown in . 400 N pivot 40 cm metal bar Calculate the moment of his force about the pivot. State the unit. moment = The moment in is not sufficient to lift the lid. Describe how the man can increase the moment, using the same force.
1. Motion, forces and energy  →  1.5.2. Turning effect of forces
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4
A catapult consists of a rubber band attached to a handle. A student uses the catapult to fire a ball towards a target. shows the catapult just before the student releases the rubber band. rubber band ball handle When the student releases the rubber band, the ball moves towards the target. Complete the following sentences about energy transfers during this process. Use words from the box. You may use each word once, more than once or not at all. elastic force friction gravitational kinetic thermal As the rubber band is pulled back, the work done is transferred into potential energy. When the student releases the rubber band, the ball moves forward horizontally. Stored potential energy is transferred into energy. As the ball travels through the air there is friction with air molecules. This causes some of the ball’s energy to be transferred into energy. The ball does not reach the target, as shown in . path of ball Describe how the student can increase the energy of the ball, using the same catapult.
1. Motion, forces and energy  →  1.7.1. Energy
1. Motion, forces and energy  →  1.7.2. Work
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6
shows a liquid-in-glass thermometer. –10 °C liquid Which of these metals is often used for the liquid in thermometers? Tick the correct box. magnesium mercury silver The thermometer is placed inside a freezer containing ice. Suggest the temperature of the ice. Draw an arrow on . A thermometer is calibrated using two fixed points. State the temperatures of the two fixed points. lower fixed point = °C upper fixed point = °C The sentences are about thermal processes. Complete each sentence. Use words from the box. Each word may be used once, more than once or not at all. conductor convection emitter insulator radiation reflection • A dull black surface is a good • Copper is used to make pans because it is a good thermal • In fluids, thermal energy is transferred mainly by • Thermal energy reaches Earth from the Sun by means of
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
2. Thermal physics  →  2.3.1. Conduction
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7
shows a floating plastic ball attached by a long rope to a weight on the bottom of a lake. A water wave on the surface of the lake causes the ball to move vertically up and down. direction of travel of the water wave ball rope weight 24 cm On , indicate the wavelength of the wave. Label the distance W. Determine the amplitude of the wave. amplitude = cm The ball reaches its maximum height 40 times in 60 seconds. Calculate the frequency of the wave. frequency = Hz Explain how the motion of the ball shows that the water wave is transverse. State another example of a transverse wave.
3. Waves  →  3.1. General properties of waves
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8
Fig 8.1 shows two parallel rays of light that pass through a thin converging lens. The diagram is incomplete. There is a principal focus at f1 and at f2. X Y f1 f2 C On , complete the ray diagram to show how the lens focuses the light. Which distance on is a focal length of the lens? Tick (✓) one box. C to f2 f1 to f2 f2 to Y A ray of light travels through a semicircular glass block, as shown in . z air glass block State the term given to the angle of incidence labelled z. shows another ray of light travelling in the semicircular glass block. air glass block The angle of incidence is greater than z. Continue the path of the ray of light until it leaves the block.
3. Waves  →  3.2.3. Thin lenses
3. Waves  →  3.2.2. Refraction of light
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9
A machine pushes a metal post into the ground using a hammer, as shown in . The hammer makes a loud noise when it hits the post. hammer post machine A man stands 160 m from the hammer. A man sees the hammer hit the post and a short time later hears the sound of the post being hit. Explain the delay in hearing the sound. The hammer is 320 m from a large building as shown in . large building 320 m 160 m post machine man The man hears the hammer hit the post and then hears an echo. Explain why he hears the echo. The speed of sound in air is 320 m / s. Calculate the time difference between the man hearing the first sound and the time at which he hears the echo. time difference = Suggest how the sound of the echo is different from the first sound.
3. Waves  →  3.4. Sound
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10
A student places a bar magnet onto a sheet of paper, as shown in . S N X Y sheet of paper The student shows the pattern of the magnetic field lines around the magnet. On carefully draw two magnetic field lines above the centre line XY and two magnetic field lines below XY. Indicate the direction of the magnetic field lines. Use an arrow. Mark one field line above XY and one field line below XY. State the name of a piece of equipment that can be used to determine the direction of the magnetic field. Describe how the student can use a bar magnet to test whether a metal rod is a magnet.
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
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11
A student wants to find the resistance of a wire. He connects the circuit shown in . wire V A A teacher checks the circuit and identifies three errors. Using the components given in , carefully draw the correct circuit diagram in the space below. The student uses the correct circuit. The student finds that the current is 0.3 A when the potential difference across the wire is 2.7 V. Calculate the resistance of the wire. resistance = Ω The student tests two other pieces of wire made of the same metal. He compares each resistance value with that of the first wire. State how the resistance compares with the first wire for a wire that is longer, but of the same thickness, for a wire that is thicker, but of the same length.
4. Electricity and magnetism  →  4.2.4. Resistance
4. Electricity and magnetism  →  4.3.2. Series and parallel circuits
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12
This question is about radioactive materials. State the name of the electromagnetic radiation emitted by some nuclei when they decay. Describe the composition and the penetrating ability of an α-particle. composition penetrating ability Americium-241 is a radioactive isotope. It has a half-life of 400 years. A sample contains americium-241. Calculate the percentage of americium-241 that remains in the sample after 800 years have passed. percentage remaining = %
5. Nuclear physics  →  5.2.3. Radioactive decay
5. Nuclear physics  →  5.2.4. Half-life
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