1) Diagram 1

1) Diagram 1.1 and Diagram 1.2 show two eggs released from the same height and drop on to Surface A and Surface B

respectively. Diagram 1.1 Diagram 1.2(a) What is meant by impulse? ................................................................................................................................................................................(1 mark)(b) With reference to Diagram 1.1 and Diagram 1.2;

(i) Compare the force on the eggs that strike Surface A and Surface B. ................................................................................................................................................................................(1 mark)(ii) Compare the time of impact of the eggs on Surface A and Surface B.

................................................................................................................................................................................(1 mark)(iii) Compare the change in momentum of the eggs in both situations.

...............................................................................................................................................................................(1 mark)(iv) State the relationship between the force produced in a collision and the time of impact. ................................................................................................................................................................................(1 mark)(v) Suggest a suitable material for Surface A.

................................................................................................................................................................................(1 mark)(c) The mass of the egg is 0.05 kg. Calculate the impulsive force if the velocity just before hitting the ground is 5 ms-1 and the impact is 0.2s.

(2 marks)

2) The figure shows water flowing through a filter funnel with a ping-pong ball inside.

Figure 2(a) Mark with X the region of high pressure inside the filter funnel.

(1 mark)

(b) State what happen to the ping pong ball

..(1mark)

(c) Explain your answer for (b)

. (2 marks)

(d) State the physics concept involve

..(1mark)

3) Diagram 3.1 shows a block of copper with mass of 200 g is heated in boiling water. The hot copper is then quickly transferred to a beaker containing 700 g of water at 30 C as shown in Diagram 3.2. After 2 minutes the thermal equilibrium is achieved and the final temperature is 80 C.

(a) State the initial temperature of the copper block

..(1mark)(b) Sketch a temperature agains time graph for the block of copper and water below. (2 marks)

Temperature/C

Time / second

(c) Explain why the temperature is constant during thermal equlibrium. .

(2 marks)

(d) Calculate the heat absorb by the water if specific heat capacity of water is 4200 Jkg-1C-1.

(2 marks)

4) The diagram 4.1 shows a ray of light passing from a glass block to air.[ Refractive index of glass = 1.54 ]

Diagram 4.1 (a) (i) Determine the value of the angle ( . (2 marks) (ii) Calculate the speed of light in glass if speed of light in vacuum is 3x108ms-1 (2 marks)

(b) Diagram below shows a coin in a beaker filled with water. Image of the coin appear to be nearer to the surface of water.

(i) Name the physics concept involved.

..(1mark) (ii) In Diagram 4.2 , draw a ray diagram from a coin to the eye to show how the image of the coin is formed.

Diagram 4.2

5) Diagram 5 shows an ultrasonic waves transmitted from a boat to the seabed to determine the depth, D,of the sea. The speed of the ultrasonic waves in water is 1 500 ms-1. The echo of the waves is received 2.0 s after the transmission.

Diagram 5

(a) State the sound wave phenomenon for detecting the depth of sea ..(1mark)(b) Explain why sonar used a high frequency sound wave. ..(2 marks)(c) Determine the depth of the sea.

(2 marks)

(d)The figure shows an airport using radar to determine the position of aeroplanes.

(i) Name the type of wave used.

...(1mark) (ii) Why radar a placed at high position?

...(1mark) (iii) State a modification on the size of the dics to improve radar tranmission.

.(2marks)6) Diagram 6 shows a circuit.

Diagram 6

(a)When switch S is closed calculate (i) the effective resistance

(2 marks)

(ii) Reading of A

(2 marks ) (iii) Reading of A1

(2 marks )

(iv) Voltage across the 4 resistor.

(2 marks )

(b) If switch S is open what is the effective resistance

(2 marks )

9) Diagram 8.1 shows two identical steel balls placed onto spring M and spring N. Both springs are elastic and fixed to a horizontal surface. The springs are pushed down until the lengths of spring M and spring N are the same. Figure 8.2 shows the maximum heights reached by the balls when the hands are released. (Assume spring M and N are of the same material, same coil diameter and same original length) (a) State Hookes law.

(1 mark)

(b) Based on Diagram 8.1 and Diagram 8.2

(i) Compare the thickness of the spring wire, the force used to compress the spring and maximum height reached by the ball and the extension of the spring.

Relate the the thickness of spring wire with maximum height reached by the ball to make a deduction regarding the the thickness of spring wire and the spring constant.

(5 marks)

(ii) State two other modification that can be done to the spring to increase the maximum height reached by the ball. (4 marks)(c) Diagram 9.3 shows a motorcycle. You are asked to modify the motorcycle so that it can carry an ice cream box at the back.

Your modification should include the following aspects

(i) the tyre use

(ii) material of the motorcyle body

(iii) suspension

(iv) seat (10 marks)10) Diagram 10.1 shows a hydraulic jack lifting the back portion of the car.

Diagarm 10.1

(a) (i) State the physics principle involve in hydraulic jack. (1 mark)

(ii) Explain how the hydraulic jack can be used to lift up the car. (4 marks) (iii) Explain why water is not suitable to be used as the fluid in a hydraulic system (2 marks)

(b) Table 10.2 shows four type of hydraulic jack, K, L, M, and N, with different specifications.

Hydraulic jackCompression of hydraulic fluidSpecific heat capacity of hydraulic fluid / Jkg-1C-1Strength of the pipeArea of big piston

KEasy150StrongBig

L Difficult2500StrongBig

MEasy4200WeakSmall

NDifficult800WeakSmall

Table 10.2 You are required to explain the suitability of the aspects in the table and determine the most suitable hydraulic jack that can be used to lift up the car.

(10 marks)

(c) Diagram 10.3 shows a simple hydraulic machine used for lifting heavy loads such as cars in a garage. It consists of two pistons, X and Y of cross sectional area 0.2 m2 and 0.8 m2, respectively. The mass of the load ontop of the large piston is 50kg.

(i) Calculate the pressure exerted by piston Y on the liquid.

(ii) Calculate the force need to applied on piston X to lift up the load. (4 marks)

A1

7)

Diagram 10.3