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9th Class Physics Chapter 3 MCQs with Answers

9th Class Physics Chapter 3 MCQs

9th Class Physics Chapter 3 MCQs dynamics is the study of forces and their resultant effects on motion. It discusses a number of topics on Newton’s laws of motion, which form the very basis for knowing how objects move under various forces. Try Practice MCQs on Dynamics to improve your understanding as well as test-taking ability.

Core Areas in Dynamics This list, therefore comprises all such key topics, including force, momentum, and acceleration, and others that are of great importance in solving problems in theoretical as well as practical contexts during an examination.

What is the term for the force that opposes the relative motion between two surfaces in contact?
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
a) Friction

Which of Newton’s laws of motion states that an object at rest will remain at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an external force?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force required to maintain the motion of an object with constant velocity is:
a) Zero
b) Equal to its mass
c) Equal to its weight
d) Equal to its acceleration

Answer
a) Zero

According to Newton’s Second Law of Motion, the acceleration of an object is directly
proportional to the net force acting on it and inversely proportional to its:
a) Mass
b) Weight
c) Velocity
d) Momentum

Answer
a) Mass

The force acting on an object immersed in a fluid, such as air or water, in the opposite direction to its motion is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
a) Drag force

Which of Newton’s laws of motion states that the acceleration of an object is directly
proportional to the net force applied to it and inversely proportional to its mass?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
b) Newton’s Second Law

The force that pulls objects towards the center of the Earth is known as:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
d) Gravity

Which of Newton’s laws of motion states that for every action, there is an equal and
opposite reaction?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
c) Newton’s Third Law

The force that opposes the motion of an object sliding along a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
a) Friction

The tendency of an object to resist changes in its state of motion is called:
a) Inertia
b) Momentum
c) Acceleration
d) Velocity

Answer
a) Inertia

What is the force that allows birds to fly and balloons to float in the air?
a) Friction
b) Tension
c) Buoyant force
d) Gravity

Answer
c) Buoyant force

When an object is in equilibrium, the net force acting on it is:
a) Zero
b) Maximum
c) Minimum
d) Equal to its weight

Answer
a) Zero

The force required to lift an object vertically upward at a constant velocity is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
b) Zero

The force that acts on an object in motion, opposing its motion as it moves through a fluid (e.g., air or water), is known as:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
a) Drag force

Which of Newton’s laws of motion states that an object will experience an acceleration when a net force acts on it?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
b) Newton’s Second Law

The upward force exerted by a fluid on an object immersed in it is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
b) Buoyant force

The force that acts on an object in the opposite direction to its motion on a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
a) Friction

Which of Newton’s laws of motion is often referred to as the “law of inertia”?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force that acts on an object to support its weight on a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
c) Normal force

According to Newton’s Third Law of Motion, the force exerted by object A on object B is:
a) Equal in magnitude and opposite in direction to the force exerted by object B on object A
b) Equal in magnitude and direction to the force exerted by object B on object A
c) Greater in magnitude and opposite in direction to the force exerted by object B on object A
d) Lesser in magnitude and opposite in direction to the force exerted by object B on object A

Answer
a) Equal in magnitude and opposite in direction to the force exerted by object B on object A

The force required to keep an object moving in a circle at a constant speed is called:
a) Centripetal force
b) Gravitational force
c) Normal force
d) Tension force

Answer
a) Centripetal force

When a net external force acts on an object, it will undergo:
a) Uniform motion
b) Constant acceleration
c) Zero acceleration
d) Deceleration

Answer
b) Constant acceleration

The force exerted by a stretched spring or a compressed material is called:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
c) Elastic force

The force that opposes the motion of an object through a fluid, such as air or water, is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
a) Drag force

Which of Newton’s laws of motion explains why people feel thrown forward when a
moving vehicle comes to a sudden stop?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force of attraction between any two objects with mass is described by:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
d) Gravity

The force required to lift an object vertically upward at a constant velocity is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
b) Zero

The force that acts on an object to support its weight on a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
c) Normal force

Which of Newton’s laws of motion explains why it is easier to push a shopping cart with
wheels than to pull it along the ground?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force that opposes the relative motion between two surfaces in contact is called:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
a) Friction

The force that keeps planets in orbit around the Sun is known as:
a) Centripetal force
b) Gravitational force
c) Normal force
d) Tension force

Answer
b) Gravitational force

The force required to accelerate an object with mass is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
c) Equal to its mass

The force that opposes the motion of an object sliding along a surface is called:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
a) Friction

According to Newton’s Second Law of Motion, the acceleration of an object is directly
proportional to the net force acting on it and inversely proportional to its:
a) Mass
b) Weight
c) Velocity
d) Momentum

Answer
a) Mass

The force that acts on an object in motion, opposing its motion as it moves through a fluid (e.g., air or water), is known as:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
a) Drag force

The tendency of an object to resist changes in its state of motion is called:
a) Inertia
b) Momentum
c) Acceleration
d) Velocity

Answer
a) Inertia

What is the force that allows birds to fly and balloons to float in the air?
a) Friction
b) Tension
c) Buoyant force
d) Gravity

Answer
c) Buoyant force

Which of Newton’s laws of motion states that an object will experience an acceleration
when a net force acts on it?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
b) Newton’s Second Law

The upward force exerted by a fluid on an object immersed in it is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
b) Buoyant force

Which of Newton’s laws of motion states that an object at rest will remain at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an external force?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force that acts on an object to support its weight on a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
c) Normal force

When an object is in equilibrium, the net force acting on it is:
a) Zero
b) Maximum
c) Minimum
d) Equal to its weight

Answer
a) Zero

The force required to lift an object vertically upward at a constant velocity is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
b) Zero

The force that acts on an object in the opposite direction to its motion on a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
a) Friction

The force required to keep an object moving in a circle at a constant speed is called:
a) Centripetal force
b) Gravitational force
c) Normal force
d) Tension force

Answer
a) Centripetal force

When a net external force acts on an object, it will undergo:
a) Uniform motion
b) Constant acceleration
c) Zero acceleration
d) Deceleration

Answer
b) Constant acceleration

The force that opposes the motion of an object through a fluid, such as air or water, is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
a) Drag force

Which of Newton’s laws of motion explains why people feel thrown forward when a moving vehicle comes to a sudden stop?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force of attraction between any two objects with mass is described by:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
d) Gravity

The force required to lift an object vertically upward at a constant velocity is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
b) Zero

The force experienced by an object moving in a circular path that keeps it in that path is called:
a) Centripetal force
b) Gravitational force
c) Normal force
d) Tension force

Answer
a) Centripetal force

When an object falls freely under the influence of gravity, its acceleration is approximately:
a) 9.8 m/s²
b) 5.0 m/s²
c) 1.0 m/s²
d) 0.5 m/s²

Answer
a) 9.8 m/s²

The force required to maintain the motion of an object moving at a constant velocity in a straight line is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
b) Zero

The force that opposes the motion of an object due to its interaction with the air is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Gravity

Answer
a) Drag force

When a net external force acts on an object, it will undergo:
a) Uniform motion
b) Constant acceleration
c) Zero acceleration
d) Deceleration

Answer
b) Constant acceleration

The force required to lift an object vertically upward at a constant velocity is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
b) Zero

The force that opposes the motion of an object sliding along a surface is called:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
a) Friction

According to Newton’s Second Law of Motion, the acceleration of an object is directly
proportional to the net force acting on it and inversely proportional to its:
a) Mass
b) Weight
c) Velocity
d) Momentum

Answer
a) Mass

The force that acts on an object in motion, opposing its motion as it moves through a fluid (e.g., air or water), is known as:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
a) Drag force

The tendency of an object to resist changes in its state of motion is called:
a) Inertia
b) Momentum
c) Acceleration
d) Velocity

Answer
a) Inertia

What is the force that allows birds to fly and balloons to float in the air?
a) Friction
b) Tension
c) Buoyant force
d) Gravity

Answer
c) Buoyant force

Which of Newton’s laws of motion states that an object will experience an acceleration
when a net force acts on it?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
b) Newton’s Second Law

The upward force exerted by a fluid on an object immersed in it is called:
a) Drag force
b) Buoyant force
c) Tension force
d) Normal force

Answer
b) Buoyant force

The force that acts on an object to support its weight on a surface is called:
a) Friction
b) Tension
c) Normal force
d) Gravity

Answer
c) Normal force

Which of Newton’s laws of motion explains why it is easier to push a shopping cart with
wheels than to pull it along the ground?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation

Answer
a) Newton’s First Law

The force that opposes the relative motion between two surfaces in contact is called:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
a) Friction

The force that keeps planets in orbit around the Sun is known as:
a) Centripetal force
b) Gravitational force
c) Normal force
d) Tension force

Answer
b) Gravitational force

The force required to accelerate an object with mass is:
a) Equal to its weight
b) Zero
c) Equal to its mass
d) Equal to its acceleration

Answer
c) Equal to its mass

The force that opposes the motion of an object sliding along a surface is called:
a) Friction
b) Tension
c) Elastic force
d) Gravity

Answer
a) Friction

According to Newton’s Second Law of Motion, the acceleration of an object is directly
proportional to the net force acting on it and inversely proportional to its:
a) Mass
b) Weight
c) Velocity
d) Momentum

Answer
a) Mass

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See Also  9th Class Chemistry Chapter 7 MCQs with Answers
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