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Section A Answer all the questions in this section. 5054/02/O/N/07 1 A parachutist jumps from an aircraft. Some time later, the parachute opens. Fig. 1.1 is a graph of the vertical speed of the parachutist plotted against time t. Fig. 1.1 (a) State what happens at t = 20 s and t = 55 s. at 20 s ................................................................... ........................................................... at 55 s ................................................................... ..................................................... [1] (b) Describe the motion of the parachutist between t = 0 and t = 20 s. ..................................................................... ..................................................................... ..................................................................... ..................................................................... ..................................................................... ............................................................... [2] (c) Explain, in terms of the forces acting, why the speed of the parachutist is constant between t = 25 s and t = 55 s. ..................................................................... ..................................................................... ..................................................................... .....................................................................

Paper-2 Set B (Source)

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Page 1: Paper-2 Set B (Source)

Section AAnswer all the questions in this section.5054/02/O/N/071 A parachutist jumps from an aircraft. Some time later, the parachute opens. Fig. 1.1 is a graph of the vertical speed of the parachutist plotted against time t.

Fig. 1.1 (a) State what happens at t = 20 s and t = 55 s.at 20 s ..............................................................................................................................at 55 s ........................................................................................................................ [1] (b) Describe the motion of the parachutist between t = 0 and t = 20 s. .......................................................................................................................................... .......................................................................................................................................... .................................................................................................................................... [2](c) Explain, in terms of the forces acting, why the speed of the parachutist is constant between t = 25 s and t = 55 s. .......................................................................................................................................... .......................................................................................................................................... .................................................................................................................................... [2] (d) Calculate the distance travelled by the parachutist between t = 25 s and t = 55 s. distance = ................................................ [2]5054/02/O/N/092 Fig. 2.1 shows a boat stationary in still water in a narrow tunnel.

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Fig. 2.1To move the boat, two men lie on the top of it and push against the tunnel roof with their legsThey exert a total forwards force of 1680 N on the boat. (a) The men push the boat 50.0 m to the end of the tunnel. Calculate the work done on theboat by the men. work done = .................................................. [2] (b) Explain why the kinetic energy of the boat at the end of the tunnel is less than the workdone on the boat by the men. .......................................................................................................................................... .......................................................................................................................................... ...................................................................................................................................... [2]5054/02/M/J/053 Fig. 3.1 shows a weather balloon. The balloon is shown partly filled with gas from a cylinder.

Fig. 3.1The balloon contains no gas initially. When it is connected to the cylinder, gas enters the

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balloon. The pressure in the cylinder decreases.(a) Explain why the molecules inside the cylinder(i) exert a large pressure initially,............................................................................................................................................................................................................................................................................................................................................................................................... [2](ii) exert a smaller pressure in the cylinder when the balloon is filled............................................................................................................................................................................................................................................................................................................................................................................................... [1](b) The volume of the cylinder is 0.0020m3. The pressure inside the cylinder is initially200 atmospheres. When the cylinder is connected to the balloon, the final pressure inthe cylinder and the balloon is 1.0 atmosphere.The temperature of the gas remains constant.Calculate the final volume of gas in the balloon. State the equation that you use.volume = ............................. [3]5054/02/M/J/084 Liquid air contains a mixture of oxygen and nitrogen.The boiling point of nitrogen is –196 °C and the boiling point of oxygen is –183 °C. A sample of liquid air in a beaker is allowed to warm up slowly. Fig. 4.1 shows how the reading of a thermometer in the beaker varies with time t.

Fig. 4.1 (a) Describe the two changes of state that occur and state when they occur. ..........................................................................................................................................

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.......................................................................................................................................... .......................................................................................................................................... ..................................................................................................................................... [3] (b) The liquid air contains 200 g of liquid oxygen and 800 g of liquid nitrogen. The specific heat capacity of liquid oxygen is 1.7 J / (g °C) and the specific heat capacityof liquid nitrogen is 2.0 J / (g °C). Calculate the thermal energy needed to warm the liquid from –205 °C to −196 °C. State the formula that you use in your calculation. energy = ................................................ [4]5054/02/M/J/075 Fig. 5.1 is drawn full scale. The focal length of the lens is 3.0 cm.

Fig. 5.1(a) On Fig. 5.1, draw two rays from the top of the object O that meet at the image. [2](b) (i) Define the term linear magnification............................................................................................................................................................................................................................................................................................................................................................................................... [1](ii) Determine the magnification produced by the lens in Fig. 5.1.magnification = ................................................ [1]

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(c) Fig. 5.2 shows a normal eye viewing an object close to it. Fig. 5.3 is a long-sighted eyeviewing an object at the same distance.

Fig. 5.2 Fig. 5.3Complete Fig. 5.3 to show the rays travelling through the eye. [1]6 Fig. 6.1 shows a coil of wire wound on a cardboard tube.There is a d.c. current in the coil. The direction of the current is shown in the key.

Fig. 6.1(a) On Fig. 6.1, draw the magnetic field produced by the coil. [3](b) Fig. 6.2 shows a simple loudspeaker that uses the coil shown in Fig. 6.1 attached to apaper cone.

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Fig. 6.2The coil is connected to a signal generator.There is an alternating current of frequency 100 Hz in the coil.(i) State what is meant by a frequency of 100 Hz.............................................................................................................................................................................................................................................................. [1](ii) Describe and explain the movement of the coil.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. [3]5054/02/M/J/057 Fig. 7.1 shows an electrical circuit.

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Fig. 7.1(a) On Fig. 7.1, draw an arrow at A to show the direction of flow of the electrons in the wire.[1](b) What is the name of component X?................................................................................................................................... [1](c) State and explain how the potential difference across X varies as the light shining on itbecomes brighter........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ [2]5054/22/M/J/108 A radioactive rock emits gamma-rays. A teacher plans an experiment to show a class that the emission of gamma-rays from the rock is random in time. (a) (i) State the apparatus that the teacher needs to detect the gamma-rays. .................................................................................................................................. .............................................................................................................................. [1] (ii) State one safety precaution that the teacher must take. .................................................................................................................................. .............................................................................................................................. [1] (iii) Describe how the experiment is performed. .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. ..................................................................................................................................

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.................................................................................................................................. .............................................................................................................................. [2](b) Describe what is meant by a gamma-ray. .......................................................................................................................................... ...................................................................................................................................... [2]5054/02/O/N/0511 Fig. 11.1 shows how the currents in a lamp L and in a wire W vary with the potential difference(p.d.) applied.

Fig. 11.1(a) (i) Draw a diagram of the circuit that you would use to take the readings of current and p.d.for the lamp. State the range you would choose for the voltmeter. [5](ii) Describe how the resistance of the lamp L varies as the p.d. increases. [1](b) (i) Fig. 11.2 shows the lamp L and the wire W connected in series. The current in the circuitis 0.8 A.

Fig. 11.2

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Determine, using the graph or by calculation,1. the p.d. across L,2. the p.d. across W,3. the p.d. of the supply,4. the resistance of the lamp L in Fig. 11.2. [5](ii) Fig. 11.3 shows the lamp and wire connected in parallel.A p.d. of 12 V is connected across them.

Fig. 11.3Determine, using the graph or by calculation,1. the current IW in the wire W,2. the current IL in the lamp L,3. the total current I in the circuit,4. the resistance of the wire W. [4]