Class 9 Practice Level 1 – Force and Laws of Motion

Total questions: 40

What is the SI unit of force?

Topic: Force

Kilogram

Meter

Newton

Joule

None

Which of the following is an example of Newton's First Law of Motion?

Topic: Newton's First Law of Motion

A car accelerating

A ball rolling and eventually stopping

A rocket launching

Two students pushing on opposite sides of a table but it is static

None

Inertia is the tendency of an object to:

Topic: Inertia

Change its state

Remain at rest

Remain in motion

Both b and c

None

According to Newton's Second Law of Motion, force is equal to:

Topic: Newton’s Second Law of Motion

Mass × velocity

Mass × acceleration

Mass × distance

Mass × time

None

Newton's Third Law of Motion states that for every action, there is an equal and opposite:

Topic: Newton’s Third Law of Motion

Force

Motion

Reaction

Inertia

None

Which of the following describes balanced forces?

Topic: Balanced Forces

Forces that cause acceleration

Forces that cause deceleration

Forces that cancel each other out

Forces that change direction

None

Unbalanced forces can cause an object to:

Topic: Unbalanced Forces

Remain stationary

Change its state of motion

Remain in uniform motion

Both a and c

None

Weight is the force exerted by:

Topic: Mass and Weight

Mass

Velocity

Gravity

Acceleration

None

Momentum is the product of:

Topic: Momentum

Mass and velocity

Mass and acceleration

Force and distance

Force and time

None

10.

When you push against a wall, the wall pushes back with:

Topic: Action and Reaction Forces

Less force

More force

Equal force

No force

None

11.

Frictional force always acts:

Topic: Friction

In the direction of motion

Opposite to the direction of motion

Perpendicular to the direction of motion

At an angle to the direction of motion

None

12.

In a free body diagram, forces are represented by:

Topic: Free Body Diagram

Points

Lines

Arrows

Circles

None

13.

Which of the following is a contact force?

Topic: Types of Forces

Gravitational force

Magnetic force

Frictional force

Electrostatic force

None

14.

The gravitational force between two objects depends on:

Topic: Gravitational Force

Their masses and the distance between them

Their velocities and the distance between them

Their accelerations and the distance between them

Their volumes and the distance between them

None

15.

Acceleration is the rate of change of:

Topic: Acceleration

Distance

Velocity

Time

Mass

None

16.

A force of 10 N is applied to a mass of 2 kg. What is the acceleration produced?

Topic: Force Calculation

20 m/s²

5 m/s²

10 m/s²

2 m/s²

None

17.

The law of conservation of momentum states that the total momentum of a system remains constant if:

Topic: Law of Conservation of Momentum

The system is at rest

The system is in motion

No external forces act on the system

The system is accelerating

None

18.

An object will accelerate when:

Topic: Force and Motion

Balanced forces act on it

Unbalanced forces act on it

No forces act on it

No change in direction of movement

None

19.

Which object has more inertia?

Topic: Mass and Inertia

A 1 kg mass

A 5 kg mass

A 10 kg mass

A 20 kg mass

None

20.

When two forces of 10 N and 15 N act on an object in the same direction, the resultant force is:

Topic: Resultant Force

5 N

10 N

15 N

25 N

None

21.

The net force on an object is zero if it:

Topic: Net Force

Is at rest

Is in uniform motion

Has balanced forces acting on it

All of the above

None

22.

If the mass of an object is doubled, and the applied force remains the same, the acceleration will:

Topic: Newton’s Second Law of Motion

None

23.

An object is said to be in equilibrium when:

Topic: Equilibrium

It is moving with constant velocity

It is at rest

The net force acting on it is zero

All of the above

None

24.

Friction between two surfaces can be reduced by:

Topic: Friction and Motion

Making the surfaces rougher

Increasing the weight of the objects

Using lubricants

Increasing the contact area

None

25.

Which of the following is a non-contact force?

Topic: Types of Forces

Frictional force

Gravitational force

Tension force

Applied force

None

26.

If the mass of an object on Earth is 10 kg, what is its weight? (g = 9.8 m/s²)

Topic: Gravitational Force Calculation

10 N

98 N

100 N

9.8 N

None

27.

The normal force is exerted by a surface in which direction?

Topic: Normal Force

Parallel to the surface

Perpendicular to the surface

Opposite to the surface

At an angle to the surface

None

28.

Centripetal force acts:

Topic: Centripetal Force

Away from the center of a circular path

Towards the center of a circular path

Perpendicular to the direction of motion

In the direction of motion

None

29.

Which law explains why passengers move forward in a car when it suddenly stops?

Topic: Newton's Laws Application

Newton's First Law

Newton's Second Law

Newton's Third Law

Law of Gravitation

None

30.

Which type of friction is the strongest?

Topic: Friction

Static friction

Sliding friction

Rolling friction

Fluid friction

None

31.

An object in free fall experiences?

Topic: Free Fall

Balanced forces

No forces

Only gravitational force

Frictional force

None

32.

When you walk, the reaction force to your foot pushing on the ground is because of?

Topic: Reaction Force

The ground pushing back on your foot

The air pushing on your foot

Your foot moving forward

Gravity pulling you down

None

33.

If a force of 20 N is applied to a 4 kg mass, what is the acceleration?

Topic: Newton’s Second Law of Motion

80 m/s²

5 m/s²

20 m/s²

4 m/s²

None

34.

In circular motion, the direction of velocity is?

Topic: Circular Motion

Towards the center

Along the tangent to the path

Away from the center

Perpendicular to the tangent

None

35.

Gravity on the surface of the moon is about:

Topic: Gravity

The same as on Earth

One-sixth of Earth's gravity

Twice as much as Earth's gravity

One-third of Earth's gravity

None

36.

A force of 15 N is applied to an object, producing an acceleration of 3 m/s². What is the mass of the object?

Topic: Force Calculation

5 kg

10 kg

15 kg

45 kg

None

37.

Kinetic friction occurs when:

Topic: Kinetic Friction

An object is at rest

An object is moving

An object is accelerating

An object is decelerating

None

38.

Impulse is the product of:

Topic: Impulse

Force and velocity

Mass and velocity

Force and distance

Force and time

None

39.

Which law explains why a swimmer pushes the water backwards to move forward?

Topic: Newton's Laws Application

Newton's First Law

Newton's Second Law

Newton's Third Law

Law of Gravitation

None

40.

Terminal velocity is achieved when:

Topic: Terminal Velocity

Gravitational force is greater than air resistance

Air resistance is greater than gravitational force

Gravitational force equals air resistance

There is no gravitational force

None

1 out of 40

Time's up

Class 9 Practice Level 1 – Force and Laws of Motion

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