A force of 50N is used to lift a load of 100N. What is the mechanical advantage?

Match the item in LIST A with a correct response in LIST B by writing its letters in the table below.

1. Apparent loss in weight (1 alama)
2. Earth magnetic field (1 alama)
3. Spring balance (1 alama)
4. 10 N/kg (1 alama)
5. Apparent weight (1 alama)
6. North and south poles (1 alama)
7. Least count (1 alama)
8. The resistance of the fluid to flow (1 alama)
9. Parallax error (1 alama)
10. Lever (1 alama)

Boresha ili kuona majibu ya mfano.

Fill the correct answer in the blank spaces provided. i. Simple pendulum moves _______________ and ________________. ii. In liquid ___________________ act equally to all directions. iii. The deviation from the true reading is called as ______________________. iv. The rate of change of velocity is called _____________________ v. In the ________________ lever, the fulcrum is located between the effort and the load. vi. Mercury has an ______________________ meniscus. vii. Bandages and cotton wool are used to clean and cover _______________ viii. Liquid and __________ are made up of particles that are in random motion. ix. The_________________ force causes the machine parts to tear and wear. x. The S.I unit of turning effect of a force is ________________________.

1. Simple pendulum moves _______________ and ________________. (1 alama)
2. In liquid ___________________ act equally to all directions. (1 alama)
3. The deviation from the true reading is called as ______________________. (1 alama)
4. The rate of change of velocity is called _____________________. (1 alama)
5. In the ________________ lever, the fulcrum is located between the effort and the load. (1 alama)
6. Mercury has an ______________________ meniscus. (1 alama)
7. Bandages and cotton wool are used to clean and cover _______________. (1 alama)
8. Liquid and __________ are made up of particles that are in random motion. (1 alama)
9. The_________________ force causes the machine parts to tear and wear. (1 alama)
10. The S.I unit of turning effect of a force is ________________________. (1 alama)

Boresha ili kuona majibu ya mfano.

c. A train of mass 22,400kg moving at the rate of 112km/hr is brought to rest in 24 seconds by the action of the brakes. Calculate the braking force applied.

1. List two (2) conditions for a body to be stable. (0 alama)
2. Why a passenger sitting in a moving bus tends to fall forward when the bus suddenly stops? (0 alama)
3. A train of mass 22,400kg moving at the rate of 112km/hr is brought to rest in 24 seconds by the action of the brakes. Calculate the braking force applied. (0 alama)
4. Define inertia. (0 alama)
5. Why a passenger sitting in a moving bus tend to fall forward when the bus suddenly stops? (0 alama)
6. List two (2) conditions for a body to be stable. (0 alama)

Boresha ili kuona majibu ya mfano.

Consider the figure below. Calculate: i. The current flowing through the circuit ii. Potential difference (p.d) across 5 Ω, 4 Ω and 6 Ω resistors.

1. The current flowing through the circuit (0 alama)
2. Requirement 1 (1 alama)
3. With examples, distinguish between elastic and inelastic collision. (0 alama)
4. Calculate the momentum of trolley A before the collision. (0 alama)
5. Potential difference (p.d) across 5 Ω, 4 Ω and 6 Ω resistors. (0 alama)
6. Calculate the momentum of trolley A after the collision. (0 alama)
7. Why is there a change in the momentum of trolley A? (0 alama)

Boresha ili kuona majibu ya mfano.

a. i. State Archimedes’ principle ii. Why does a stone sink in water? Page 4 of 16 Candidate’s Examination Number ………………………………………………… b. The mass of an empty density bottle was 50g. When filled with the volume of 20cm3 of petrol its mass become 75g. Calculate the: i. Density of petrol ii. Relative density of petrol 5. a. i. Differentiate between luminous and non-luminous objects. ii. State the laws of reflection of light. Page 5 of 16

1. State Archimedes’ principle (2 alama)
2. Why does a stone sink in water? (3 alama)
3. Calculate the density of petrol (5 alama)
4. Calculate the relative density of petrol (5 alama)

Boresha ili kuona majibu ya mfano.

a. i. What is the meaning of First Aid kit? ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ii. Complete the table below by writing uses of items found in First Aid kit. No. Item Uses i. Antiseptic soap ii. Liniment iii. Scissors and razor blade iv. Petroleum jelly b. By using a chart, name all steps involved in a scientific investigation.

1. What is the meaning of First Aid kit? (0 alama)
2. By using a chart, name all steps involved in a scientific investigation. (0 alama)
3. What is the meaning of First Aid kit? (2 alama)
4. Complete the table below by writing uses of items found in First Aid kit. No. Item Uses i. Antiseptic soap ii. Liniment iii. Scissors and razor blade iv. Petroleum jelly (0 alama)
5. Complete the table below by writing uses of items found in First Aid kit. No. Item Uses i. Antiseptic soap ii. Liniment iii. Scissors and razor blade iv. Petroleum jelly (4 alama)
6. By using a chart, name all steps involved in a scientific investigation. (4 alama)

Boresha ili kuona majibu ya mfano.

Identify the name of beam shown in the figures below

1. Differentiate between luminous and non-luminous objects. (0 alama)
2. Identify the name of beam shown in the figures below (0 alama)
3. Write two (2) characteristics of an image formed in a plane mirror. (2 alama)
4. Identify the name of beam shown in the figures below (2 alama)
5. Identify the name of beam shown in the figures below (0 alama)
6. State the laws of reflection of light. (0 alama)
7. Write two (2) characteristics of an image formed in a plane mirror. (0 alama)

Boresha ili kuona majibu ya mfano.

A body of mass 8kg is pulled by a force of 40N along a smooth floor through a distance of 80m for 4 seconds. Find i. The work done by a force

1. Define the term Joule (0 alama)
2. List two (2) requirements for work to be done. (2 alama)
3. ii. Watt (2 alama)
4. ii. Power (2 alama)

Boresha ili kuona majibu ya mfano.

A trolley A of mass 3kg is travelling at 12m/s. It collides with a stationary trolley B of mass 4kg. After the collision, the two continue travelling together at 6m/s. i. Calculate the momentum of trolley A before the collision. ii. Calculate the momentum of trolley A after the collision. iii. Why is there a change in the momentum of trolley A?

1. (2 alama)
2. Distinguish between elastic and inelastic collision with examples. (4 alama)
3. Calculate the momentum of trolley A before the collision. (2 alama)
4. Calculate the momentum of trolley A after the collision. (2 alama)
5. Why is there a change in the momentum of trolley A? (2 alama)

Boresha ili kuona majibu ya mfano.

In an experiment to verify Ohm’s law the following results were obtained. Potential difference, (V) Current, (I) 1.0 0.50 1.5 0.75 2.0 1.00 2.5 1.20 3.0 1.50 3.5 2.00 i. Plot the graph of the potential difference (V) against current (I) (on the graph paper). ii. From the graph determine the slope, s. iii. What is the physical significance of the slope, s? iv. Write the S.I unit of the slope in 9 (b) ii above.

1. Plot the graph of the potential difference (V) against current (I) (on the graph paper). (4 alama)
2. What is the physical quantity that the instrument measure? (1 alama)
3. In an experiment to verify Ohm’s law the following results were obtained. Potential difference, (V) Current, (I) 1.0 0.50 1.5 0.75 2.0 1.00 2.5 1.20 3.0 1.50 3.5 2.00 (Assuming this is part of a larger question where calculations or graph plotting is required) (10 alama)
4. What is the physical quantity that the instrument measure? (1 alama)
5. From the graph determine the slope, s. (3 alama)
6. What is the name of this device? (1 alama)
7. What is the physical significance of the slope, s? (2 alama)
8. Name the part labeled by letter M (1 alama)
9. Name the part labeled by letter M. (1 alama)
10. Write the S.I unit of the slope in 9 (b) ii above. (1 alama)
11. Name the part labeled by letter P (1 alama)
12. Name the part labeled by letter P. (1 alama)
13. What is the reading in °C that shows the condition of Student? (1 alama)
14. What is the reading in oC that shows the condition of Student? (2 alama)

Boresha ili kuona majibu ya mfano.

i. List two (2) ways in which resistors can be connected. ii. With two (2) examples, give the meaning of conductor and insulator.

1. List two (2) ways in which resistors can be connected. (2 alama)
2. With two (2) examples, give the meaning of conductor and insulator. (4 alama)

Boresha ili kuona majibu ya mfano.