A uniform metre rule is balanced at its centre of mass. A load of 3 N is placed at 20 cm mark and another load of 7 N is placed at 70 cm mark. Find the position of the pivot.

1. Calculate the amount of force applied at the end of the handle when lifting the car. (6 mk)
2. A uniform metre rule is balanced at its centre of mass. A load of 3 N is placed at 20 cm mark and another load of 7 N is placed at 70 cm mark. Find the position of the pivot. (6 mk)

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You wake up in the morning and find your classmate at the school kitchen shouting, "The morning porridge is very hot! \ts temperature is 350 K". What temperature is this on the Celsius scale?

1. A Form Two student was arguing that temperature is the degree of hotness and coldness of a body and it is impossible to explain this concept by using the kinetic theory of matter. How can you refute this argument? (4 mk)
2. You wake up in the morning and find your classmate at the school kitchen shouting, "The morning porridge is very hot! \ts temperature is 350 K". What temperature is this on the Celsius scale? (3 mk)

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An athlete standing in a boat throws an object out of the boat and the boat tends to move in the opposite direction to the object. What is the suitable law of motion that explains this phenomenon?

1. Consider a book placed on the table what are the forces acting on it? (2 mk)
2. An athlete standing in a boat throws an object out of the boat and the boat tends to move in the opposite direction to the object. What is the suitable law of motion that explains this phenomenon? (2 mk)

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What name is given to the process in which a parallel beam of incident light is reflected as a parallel beam in one direction?

Suppose a bird is on the tree at a certain height above the ground and a boy threw a stone to hit the bird on the tree. If the bird falls and strikes the ground with a velocity of 80 m/s: (i) What will be the height of the bird from the ground? (3 marks) (ii) Calculate the time taken by the bird to hit the ground. (3 marks)

1. What will be the height of the bird from the ground? (3 marks) (3 mk)
2. Calculate the time taken by the bird to hit the ground. (3 marks) (3 mk)
3. A fixed wheel with a rope passing round a groove in the wheel's circumference. (1 mk)
4. The ratio of the work output to the work input times 100%. (1 mk)
5. Consists of a rigid bar that moves about a fixed point. (1 mk)

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(a) (i) To lift a heavy load to the roof, which simple machine will be used? (1 mark) (ii) State the mechanical advantage of an incline plane related to the angle of inclination? (3 marks) (b) A Physics teacher was driving on a rough road. The right front tyre of the car ran over a sharp object and got a puncture. The teacher used a screw-jack with a handle which has a length of 40 cm long and a pitch of 0.5 cm to lift a car whose mass is 350 kg. If the efficiency of the screw-jack is 45%, calculate the amount of force applied at the end of the handle when lifting the car. (6 marks)

1. What will be the height of the bird from the ground? (3 mk)
2. Properties of magnetic field. (2 mk)
3. Calculate the time taken by the bird to hit the ground. (3 mk)
4. State the mechanical advantage of an incline plane related to the angle of inclination? (3 marks) (3 mk)
5. A Physics teacher was driving on a rough road. The right front tyre of the car ran over a sharp object and got a puncture. The teacher used a screw-jack with a handle which has a length of 40 cm long and a pitch of 0.5 cm to lift a car whose mass is 350 kg. If the efficiency of the screw-jack is 45%, calculate the amount of force applied at the end of the handle when lifting the car. (6 marks) (6 mk)

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Suppose your school has a plan to develop a min power plant project from either water or wind sources. and the school management is seeking for a scientific advice from you. What will you advise them on this matter? Use two points. (5 marks)

1. Suppose your school has a plan to develop a min power plant project from either water or wind sources. _and the school management is seeking for a scientific advice from you. What will you advise them on this matter? Use two points. (5 mk)
2. State Archimedes' principle. (4 mk)
3. People are warned by Geophysicists not to build houses near geothermal power plants. Give two reasons for this warning. (5 mk)

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Suppose you are asked by your teacher to prepare electrical components and instruments for an experiment to determine the relationship between voltage and current; (a) Give five electrical components that can be used in this experiment.

1. Give five electrical components that can be used in this experiment. (5 mk)
2. Give five electrical components that can be used in this experiment. (5 mk)
3. Explain the concept of threshold frequency. (3 mk)

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