Examination on Physics

Class: SSS 1

Term: Third Term

Time: 1 Hour

Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)

Instruction: Answer all questions.

________ is the property of a material that makes it return to its original shape after being stretched. (a) Plasticity (b) Elasticity (c) Viscosity (d) Tension
The ________ is the point through which the entire weight of a body appears to act. (a) Equilibrium point (b) Centre of gravity (c) Pivot (d) Resultant
An example of a machine that uses a fulcrum, effort, and load is the ________. (a) Hydrometer (b) Solar panel (c) Lever (d) Thermometer
Which of the following is the unit of Young Modulus? (a) Nm (b) $Nm^{-2}$ (c) Joules (d) Watts
All of these are states of equilibrium except ________. (a) Stable (b) Unstable (c) Neutral (d) Constant
Which is NOT a factor affecting the surface tension of a liquid? (a) Temperature (b) Impurities (c) Nature of liquid (d) Atmospheric pressure
The main reason for using a lubricant in engine parts is ________. (a) To increase surface tension (b) To reduce viscosity (c) To reduce friction (d) To increase momentum
The correct step in verifying Hooke’s Law involves plotting a graph of ________. (a) Mass against Volume (b) Force against Extension (c) Velocity against Time (d) Work against Distance
Which of these is not a simple machine? (a) Inclined plane (b) Pulley (c) Internal combustion engine (d) Wheel and axle
________ is defined as the product of the mass of a body and its velocity. (a) Impulse (b) Force (c) Linear Momentum (d) Acceleration
In simple harmonic motion, the ________ is maximum at the equilibrium position. (a) Acceleration (b) Displacement (c) Velocity (d) Restoring force
A device used to measure the relative density of liquids is the ________. (a) Barometer (b) Hydrometer (c) Hygrometer (d) Manometer
Which of the following defines the Archimedes’ Principle? (a) $F = ma$ (b) Upthrust equals weight of fluid displaced (c) $V = IR$ (d) Stress is proportional to strain
All of these are applications of solar energy except ________. (a) Solar panels (b) Water heaters (c) Electrical continuity testers (d) Solar collectors
Which is NOT a vector quantity? (a) Momentum (b) Centripetal force (c) Angular speed (d) Weight
The main reason a racing car is built with a low chassis is ________. (a) To increase speed (b) To lower the centre of gravity for stability (c) To reduce fuel consumption (d) To improve aerodynamics
The correct step in calculating work done in a spring is using the formula ________. (a) $W = mgh$ (b) $W = \frac{1}{2}ke^2$ (c) $W = Fd$ (d) $W = Pt$
Which of these is not a type of projectile motion? (a) A thrown ball (b) An arrow shot from a bow (c) A car moving on a straight road (d) A stone kicked from a cliff
________ forces are forces whose lines of action are parallel to each other. (a) Concurrent (b) Parallel (c) Centripetal (d) Elastic
The time taken for a projectile to reach its maximum height is the ________. (a) Time of flight (b) Period (c) Time of ascent (d) Range
Which of the following is the SI unit for angular velocity? (a) $m/s$ (b) $rad/s$ (c) $deg/s$ (d) $rev/s$
All of these are examples of circular motion except ________. (a) Motion of a fan blade (b) A car turning a corner (c) A pendulum swinging (d) The moon orbiting the earth
Which is NOT required for a body to be in a state of floatation? (a) Upthrust equals weight (b) Density of body is less than liquid (c) Body must be completely submerged (d) Weight of fluid displaced equals weight of body
The main reason for forced vibrations reaching a large amplitude is ________. (a) Friction (b) Resonance (c) Damping (d) Tension
The correct step in checking a circuit for breaks is using a ________. (a) Voltmeter (b) Continuity tester (c) Solar collector (d) Hydrometer
Which of these is not a component of a projectile’s path? (a) Vertical displacement (b) Horizontal range (c) Viscous drag (d) Angle of projection
________ is the force per unit area. (a) Strain (b) Stress (c) Extension (d) Young Modulus
The rate of change of ________ is called centripetal acceleration in circular motion. (a) Speed (b) Angular displacement (c) Velocity (d) Mass
An example of a highly viscous liquid is ________. (a) Water (b) Alcohol (c) Honey (d) Petrol
Which of the following represents Newton’s Second Law? (a) $F = \frac{mv - mu}{t}$ (b) $E = mc^2$ (c) $P = IV$ (d) $V = u + at$
All of these are factors that determine the moment of a force except ________. (a) Magnitude of force (b) Perpendicular distance (c) Pivot point (d) Mass of the object
Which is NOT a characteristic of simple harmonic motion? (a) Periodic motion (b) Constant acceleration (c) Acceleration directed to center (d) Restoring force proportional to displacement
The main reason for the existence of surface tension is ________. (a) Gravitational force (b) Cohesive forces between molecules (c) Atmospheric pressure (d) Magnetic induction
The correct step in determining the resultant of two forces is ________. (a) Multiplying them (b) Vector addition (c) Finding the average (d) Ignoring the direction
Which of these is not an industrial unit of measurement? (a) Horsepower (b) Barrels (c) Cubits (d) Tonnes
________ is the property of a fluid that opposes relative motion between its layers. (a) Friction (b) Viscosity (c) Capillarity (d) Adhesion
The total ________ of an isolated system remains constant during collision. (a) Velocity (b) Force (c) Linear momentum (d) Acceleration
An example of neutral equilibrium is a ________. (a) Cone resting on its base (b) Ball on a flat table (c) Pencil balanced on its tip (d) Chair on four legs
Which of the following is the formula for centripetal force? (a) $mgh$ (b) $\frac{mv^2}{r}$ (c) $ma$ (d) $I\omega$
All of these are involved in the energy of a simple harmonic oscillator except ________. (a) Kinetic energy (b) Potential energy (c) Chemical energy (d) Total mechanical energy

SECTION B: THEORY (30 Marks)

Instruction: Answer any THREE questions.

Question 1

(a) State Hooke’s Law and define Young Modulus. (2 marks)

(b) Explain the difference between stable and unstable equilibrium. (3 marks)

(d) Mention two applications of viscosity in daily life. (2 marks)

Question 2

(a) Define Archimedes’ Principle. (2 marks)

(b) Distinguish between cohesive and adhesive forces in surface tension. (3 marks)

(d) List two components of a simple electrical continuity tester. (2 marks)

Question 3

(a) Define Linear Momentum and state the Law of Conservation of Linear Momentum. (2 marks)

(b) Explain the terms “Range” and “Time of Flight” as applied to projectiles. (3 marks)

(c) A body of mass 5kg moves in a circular path of radius 2m with a speed of 4m/s. Calculate the centripetal force. (3 marks)

(d) State two factors that affect the stability of an object. (2 marks)

Question 4

(a) What is Simple Harmonic Motion (SHM)? (2 marks)

(b) Explain the concept of resonance with one practical example. (3 marks)

(d) Give two advantages of using solar energy over fossil fuels. (2 marks)

Question 5

(a) Define centripetal acceleration and give its mathematical expression. (2 marks)

(b) Describe how a hydrometer is used to determine the relative density of a liquid. (3 marks)

(c) A projectile is launched at an angle. Explain how the horizontal and vertical velocities change during flight. (3 marks)

(d) Identify two types of simple machines and give an example of each. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (b) Elasticity

Question 2 – ✅ (b) Centre of gravity

Question 3 – ✅ (c) Lever

Question 4 – ✅ (b) $Nm^{-2}$

Question 5 – ✅ (d) Constant

Question 6 – ✅ (d) Atmospheric pressure

Question 7 – ✅ (c) Reduce friction

Question 8 – ✅ (b) Force against Extension

Question 9 – ✅ (c) Internal combustion engine

Question 10 – ✅ (c) Linear Momentum

Question 11 – ✅ (c) Velocity

Question 12 – ✅ (b) Hydrometer

Question 13 – ✅ (b) Upthrust equals weight of fluid displaced

Question 14 – ✅ (c) Electrical continuity testers

Question 15 – ✅ (c) Angular speed

Question 16 – ✅ (b) To lower the centre of gravity for stability

Question 17 – ✅ (b) $W = \frac{1}{2}ke^2$

Question 18 – ✅ (c) A car moving on a straight road

Question 19 – ✅ (b) Parallel

Question 20 – ✅ (c) Time of ascent

Question 21 – ✅ (b) $rad/s$

Question 22 – ✅ (c) A pendulum swinging

Question 23 – ✅ (c) Body must be completely submerged

Question 24 – ✅ (b) Resonance

Question 25 – ✅ (b) Continuity tester

Question 26 – ✅ (c) Viscous drag

Question 27 – ✅ (b) Stress

Question 28 – ✅ (c) Velocity

Question 29 – ✅ (c) Honey

Question 30 – ✅ (a) $F = \frac{mv - mu}{t}$

Question 31 – ✅ (d) Mass of the object

Question 32 – ✅ (b) Constant acceleration

Question 33 – ✅ (b) Cohesive forces between molecules

Question 34 – ✅ (b) Vector addition

Question 35 – ✅ (c) Cubits

Question 36 – ✅ (b) Viscosity

Question 37 – ✅ (c) Linear momentum

Question 38 – ✅ (b) Ball on a flat table

Question 39 – ✅ (b) $\frac{mv^2}{r}$

Question 40 – ✅ (c) Chemical energy