THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2018

SECTION A

(i)Any substance that has mass and occupies space is known as:

1. energy.
2. matter.
3. universe.
4. nature.

ii) A set of techniques used by scientists to investigate a problem refers to:

1. data interpretation.
2. scientific method.
3. performing an experiment
4. data presentation.

(iii)A vernier caliper is used to measure:

1. distance of a car.
2. diameter of a wire.
3. mass of a car.
4. length of a table.

(iv)A force which prevents a body to slide is called:

1. stretching force.
2. restoring force.
3. frictional force.
4. compressional force.

(v)The ability of a body to float in a fluid is known as:

1. the law of upthrust.
2. the law of Archimedes
3. the law of floatation.
4. floating.

(vi)One of the following is the condition for a body to float in water:

1. The mass of a floating body is greater than displaced water.
2. The density of the body must be less than the density of the fluid.
3. The upthrust due to the liquid must be smaller than the weight of the body.
4. The displaced water is less than the floating body.

(vii)In a solid state the force of attraction between molecules is greater because particles are:

1. closely packed together.
2. somehow apart.
3. not closely packed together.
4. moved so randomly.

(viii)The phenomenon observed when maize flour is poured on top of water is called:

1. diffusion. 
2.  capillarity.
3. surface tension.
4. osmosis.

(ix)Density and height are factors which affect pressure in:

1. solid.
2. solid and liquid.
3. liquid.
4. gas.

(x)When a body is performing a work, it is said to have:

1. moment.
2. energy.
3. momentum
4. work.

(xi)Which of the following unit could be used for kinetic energy?

1. Kg
2. N
3. Js
4. NM

(xii)Materials that allow only part of light to pass through them are called:

1. transparent.
2. translucent.
3. opaque. 
4.  Newton.

(xiii)What term refers to the stationary accumulation of charges on an object?

1. Current electricity
2. Static electricity
3. Charging.
4. Polarization.

(xiv)The flow of electrons in a material is called:

1. charging.
2. potential difference
3. electric current.
4. resistivity.

(xv)Which of the following materials can be magnetized strongly?

1. Nickel and copper
2. Steel and Brass
3. Cobalt and Iron
4. Cobalt and Copper

(xvi)The point where the force of gravity can be considered to act is called:

1. centre of gravity.
2. centre of mass.
3. centre of weight.
4. equilibrium.

(XVii) The rate of change of velocity of a body is known as:

1. uniform speed.
2. acceleration.
3. distance.
4. displacement.

(XViii)Why is the mechanical advantage less than three in a single rope three pulleys system?

1. Because the effort may vary.
2. Because the load rises.
3. Because the upper pulley does not move
4. Due to friction on pulleys.

(xix)The product of mass of a body and its acceleration is a result of:

1. Newtons second law of motion
2. Law of inertia.
3. Newtons third law of motion.
4. Momentum change.

(xx)A form of energy that can be persistently used without running out is

1. Efficient
2. renewable
3. non-renewable
4. effective

2.Match the items in List A with a correct response in List B by writing a letter of the correct response below the number of the corresponding item In List A in the table provided.

3.Complete each of the following statements by writing the correct answer in the space provided.

 (i) Mass of a body is defined as ..

(ii)The resultant of a force which overcomes resistance refers to 

(iii)A force which produces an acceleration of 1m/s² in a mass of Ikg is called

(iv)The proper term for a light which passes through different media is

 (v) A point just after elastic limit is called 

SECTION B

4.(a) State two conditions for a body to be in equilibrium.

(b) Distinguish between centre of mass and centre of gravity.

(c) A uniform metre rule AB is balanced horizontally on a knife edge placed 5cm from B with a mass of 60g at B. Find the mass of the ruler.

5.(a)What is energy?

(b) Mention any four types of energy.

(c) A minibus of mass of one and a half tonnes is moving with kinetic energy of 30000J. What is its velocity in Km/h?

6.(a) List down four uses of hydraulic press.

(b) Why is a hole at the bottom of a ship more dangerous than one that is near the surface?

(c) Calculate the pressure at the bottom of the sea water 52m deep, if the density of water is 1025 Kg/m³. Take the acceleration due to gravity (g) as ION/Kg.

7.(a)What is meant by acceleration?

(b) In which case is acceleration said to be uniform?

(c) A car with a velocity of 90km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration.

8.(a) Define the following terms as applied in Physics:

(i)Machine

(ii)Load

(b) Why is efficiency of machine less than 100%? Explain briefly.

(c) Simple machine was used to raise a load of weight 4000 N through a height of 0.8 m using an effort of 800 N. If the distance moved by effort was 4.8 m, calculate the: (i) Mechanical advantage. (ii) Velocity ratio.

_{SECTION C}

9. (a)A water can has three holes punched - the first at the bottom, the second at the middle and the third hole almost at the top. If water is filled in the can, how will the water spurt through the bottom and the top holes?

 (b) (i) Why is it easier to cut a piece of meat with a sharp knife than a blunt knife?

(ii) The tip of a needle of hypodermic syringe has a cross-sectional area of 1 x 10 -6 m². If a doctor applies a force of 120 N to a syringe that is connected to the needle, what is the pressure exerted at the tip of the needle?

(c) The small piston of a hydraulic press has an area of 3.0 x 10 -4 m² and the bigger piston has an area of 2.0 x 10-2 m² . The two pistons are in the same level. If the force of 120 N is applied to the small piston, calculate the force required to be applied to the bigger piston to stop it moving.

10. (a) Define the word coulomb.

(b) States Ohms law.

(c) Two resistors of 30 and 60 are connected in parallel to a 3V battery.

(i)Draw the schematic diagram.

(ii)Find the effective resistance of the circuit.

(iii)Calculate the current passing through the 60 resistor.