Forces and Motion: Interactive Learning Quizzes for Year 9 Science

Question 1

Which of Newton's laws of motion describes the relationship between force, mass, and acceleration?

Accepted Answer

Second law

Answer

First law

Answer

Third law

Answer

Law of universal gravitation

Question 2

Which of the following is NOT a type of force?

Accepted Answer

Inertia

Answer

Gravity

Answer

Friction

Answer

Tension

Question 3

A ball is thrown vertically upwards. At the top of its trajectory, which of the following forces is acting on the ball?

Accepted Answer

Gravity only

Answer

Upthrust only

Answer

Gravity and upthrust

Answer

No forces

Question 4

Which of the following is a unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Kilogram

Answer

Metre

Question 5

Which of the following is a scalar quantity?

Accepted Answer

Mass

Answer

Force

Answer

Velocity

Answer

Acceleration

Question 6

Which of the following is an example of a centripetal force?

Accepted Answer

Tension in a string

Answer

Gravity

Answer

Friction

Answer

Normal force

Question 7

According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by an unbalanced force. This law is known as the law of:

Accepted Answer

Inertia

Answer

Acceleration

Answer

Gravity

Answer

Equilibrium

Question 8

Which of the following forces causes objects to fall to the ground?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Air resistance

Question 9

Which of the following is an example of a balanced force?

Accepted Answer

A book resting on a table

Answer

A car accelerating down a hill

Answer

A person pushing against a wall

Answer

A ball rolling across the floor

Question 10

What is the SI unit of acceleration?

Accepted Answer

Meter per second squared

Answer

Meter per second

Answer

Kilogram

Answer

Newton

Question 11

Which of the following factors **does not** affect the amount of air resistance acting on an object?

Accepted Answer

Volume of the object

Answer

Speed of the object

Answer

Shape of the object

Answer

Density of the fluid

Question 12

Which of the following is **not** a real-world application of Newton's laws of motion?

Accepted Answer

Prediction of weather patterns

Answer

Design of bridges

Answer

Operation of rockets

Answer

Analysis of sports performance

Question 13

What is the SI unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Kilogram

Answer

Meter

Question 14

According to Newton's First Law, an object at rest will:

Accepted Answer

Remain at rest unless acted upon by an unbalanced force

Answer

Begin moving at a constant speed

Answer

Accelerate at a constant rate

Answer

Change direction of motion

Question 15

Which force acts against the upward motion of an object thrown vertically upwards?

Accepted Answer

Gravity

Answer

Friction

Answer

Air resistance

Answer

Normal force

Question 16

Acceleration of an object is directly proportional to the:

Accepted Answer

Force acting on it

Answer

Mass of the object

Answer

Velocity of the object

Answer

Time of motion

Question 17

Identify the type of friction that occurs when two surfaces are in contact and not moving relative to each other.

Accepted Answer

Static friction

Answer

Sliding friction

Answer

Rolling friction

Answer

Fluid friction

Question 18

On an inclined plane, which force prevents an object from sliding down?

Accepted Answer

Static friction

Answer

Kinetic friction

Answer

Gravity

Answer

Air resistance

Question 19

Out of the options given, which is not a type of force?

Accepted Answer

Thermal energy

Answer

Contact force

Answer

Non-contact force

Answer

Gravitational force

Question 20

What is the force called that works against the motion of an object in a fluid?

Accepted Answer

Drag

Answer

Friction

Answer

Tension

Answer

Gravity

Question 21

According to Newton, which law of motion describes the relationship between an object's mass, velocity, and momentum?

Accepted Answer

Second law

Answer

First law

Answer

Third law

Answer

Law of Universal Gravitation

Question 22

The equation F = ma represents:

Accepted Answer

Newton's second law of motion

Answer

Newton's first law of motion

Answer

Newton's third law of motion

Answer

Law of Conservation of Energy

Question 23

Which of the following is the unit of force in the SI system?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Coulomb

Question 24

What is the relationship between the force of gravity between two objects and the distance between them?

Accepted Answer

Inversely proportional

Answer

Directly proportional

Answer

Constant

Answer

Exponential

Question 25

Which of the following is the best way to reduce friction?

Accepted Answer

Using lubricants

Answer

Increasing the surface area

Answer

Adding more weight to the object

Answer

Decreasing the force applied

Question 26

Which example shows an object following Newton's First Law, where it stays still or keeps moving the same way unless a force acts on it?

Accepted Answer

A book sitting on a table until someone pushes it.

Answer

A ball rolling on the ground, slowing down until it stops.

Answer

A skydiver falling faster and faster towards the ground.

Answer

A spinning wheel turning around and around at the same speed.

Question 27

Which scenario best demonstrates Newton's Third Law of Motion?

Accepted Answer

A person pushing against a wall experiences an equal and opposite force from the wall.

Answer

A rocket launches upward due to the force of gravity.

Answer

A car moves forward because of the backward force of friction between its tires and the road.

Answer

A ball thrown into the air falls back down due to the downward force of air resistance.

Question 28

According to Newton's third law of motion, for every action, there is an equal and opposite reaction.

Accepted Answer

True

Answer

False

Question 29

Which of the following is a contact force?

Accepted Answer

Friction

Answer

Gravity

Answer

Air resistance

Answer

Electrostatic force

Question 30

The acceleration of an object is directly related to the ______ force acting on it.

Accepted Answer

net

Answer

gravitational

Answer

applied

Answer

mass

Question 31

Which of the following is an example of a contact force?

Accepted Answer

Friction

Answer

Gravity

Answer

Magnetic force

Answer

Electrostatic force

Question 32

The force of gravity between two objects depends on their ______ and is inversely related to the square of the distance between them.

Accepted Answer

masses

Answer

volumes

Answer

densities

Answer

radii

Question 33

A car moving at a steady speed has a ______ total force acting on it.

Accepted Answer

zero

Answer

non-zero

Answer

positive

Answer

negative

Question 34

Which factor does NOT affect the coefficient of friction?

Accepted Answer

Speed

Answer

Surface roughness

Answer

Material properties

Answer

Normal force

Question 35

A projectile thrown horizontally will have a ______ path.

Accepted Answer

parabolic

Answer

straight

Answer

circular

Answer

elliptical

Question 36

The movement of a swinging pendulum is an example of ______ motion.

Accepted Answer

periodic

Answer

random

Answer

linear

Answer

rotational

Question 37

Which of the following is not a type of force encountered in everyday life?

Accepted Answer

Heat

Answer

Gravity

Answer

Friction

Answer

Air resistance

Question 38

The force that works against the motion of an object moving through a fluid is called _________.

Accepted Answer

Air resistance

Answer

Gravity

Answer

Friction

Answer

Magnetic force

Question 39

What is the unit of force in the International System of Units (SI)?

Accepted Answer

Newton

Answer

Kilogram

Answer

Metre

Answer

Second

Question 40

Which of the following factors does not affect the amount of friction between two surfaces?

Accepted Answer

Temperature

Answer

Roughness of the surfaces

Answer

Area of contact

Answer

Force applied

Question 41

Newton's first law of motion states that:

Accepted Answer

An object at rest will remain at rest unless acted upon by an unbalanced force.

Answer

The acceleration of an object is directly proportional to the force applied to it.

Answer

For every action, there is an equal and opposite reaction.

Answer

The force of gravity is proportional to the mass of an object.

Question 42

According to Newton's third law of motion, when you push an object, the object:

Accepted Answer

Will exert an equal and opposite force on you.

Answer

Will not exert any force on you.

Answer

Will exert a greater force on you than you exert on it.

Answer

Will exert a smaller force on you than you exert on it.

Question 43

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

Accepted Answer

2 m/s²

Answer

5 m/s²

Answer

10 m/s²

Answer

20 m/s²

Question 44

A force of 50 N is applied to an object at an angle of 30° to the horizontal. What is the horizontal component of the force?

Accepted Answer

43.3 N

Answer

25 N

Answer

50 N

Answer

70.7 N

Question 45

Which force keeps the Earth in orbit around the Sun?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Magnetism

Question 46

A 20 kg object is lifted vertically at a constant velocity. What is the net force acting on the object?

Accepted Answer

0 N

Answer

20 N

Answer

40 N

Answer

80 N

Question 47

Which action **increases** the friction between two surfaces?

Accepted Answer

Using a rough surface

Answer

Applying oil

Answer

Reducing the contact area

Answer

Polishing the surfaces

Question 48

Friction is an example of a:

Accepted Answer

Contact force

Answer

Non-contact force

Answer

Magnetic force

Answer

Gravitational force

Question 49

According to Newton's third law of motion, for every action force, there is:

Accepted Answer

An equal and opposite reaction force

Answer

A greater and opposite reaction force

Answer

A smaller and opposite reaction force

Answer

No reaction force