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Class 9 Physics — Online Test

Chapter 4: Turning Effect of Forces

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📋 Instructions: Select one answer for each question, then click Submit Test at the bottom to see your score and correct answers.

Q1 The turning effect of a force is called:

Momentum Torque Inertia Friction

Q2 Torque = Force ×:

Mass Velocity Moment arm Acceleration

Q3 The SI unit of torque is:

Newton Joule N·m Watt

Q4 The centre of gravity of a uniform square lamina is at its:

Corner Edge Centre Any point

Q5 A body is in equilibrium when the net torque is:

Maximum Minimum Zero Infinite

Q6 Which of the following is an example of a couple?

Pushing a wall Opening a water tap Lifting a book Kicking a ball

Q7 The principle of moments: sum of clockwise moments equals sum of:

Forces Anticlockwise moments Masses Velocities

Q8 A stable equilibrium is one in which the centre of gravity is:

High Low At the top Outside the base

Q9 All the mass of a body is concentrated at its:

Surface Centre of gravity Edges Top

Q10 A body topples when its line of action of weight falls:

Inside the base Outside the base At the centre On the edge

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