# Laws of Motion MCQs with Answers

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## Laws of Motion Online MCQs with Answers

According to Newton’s first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by a __________.
a) Frictional force
b) Gravitational force
c) Net force
d) Magnetic force

c) Net force

Which of the following is an example of inertia?
a) A ball rolling down a hill
b) A car accelerating from rest
c) A book falling off a table
d) A coin spinning on a table

b) A car accelerating from rest

Newton’s second law of motion states that the acceleration of an object is directly proportional to the __________ applied to it.
a) Velocity
b) Mass
c) Density
d) Volume

b) Mass

The SI unit of force is __________.
a) Joule
b) Newton
c) Pascal
d) Watt

b) Newton

According to Newton’s third law of motion, for every action, there is an equal and opposite __________.
a) Reaction
b) Resultant
c) Force
d) Acceleration

a) Reaction

Which of the following is an example of Newton’s third law of motion?
a) A rocket blasting off into space
b) A ball rolling down a hill
c) A car accelerating on a straight road
d) A book falling off a table

a) A rocket blasting off into space

The force of gravity acting on an object is also known as its __________.
a) Inertia
b) Weight
c) Acceleration
d) Velocity

b) Weight

An object with a mass of 10 kg is subjected to a force of 20 N. What will be its acceleration?
a) 2 m/s^2
b) 10 m/s^2
c) 0.5 m/s^2
d) 200 m/s^2

a) 2 m/s^2

Which of the following best describes terminal velocity?
a) The maximum velocity reached by a falling object
b) The initial velocity of a moving object
c) The velocity of an object at rest
d) The velocity of an object in uniform motion

a) The maximum velocity reached by a falling object

When a net force is applied to an object, it will always cause the object to __________.
a) Accelerate
b) Decelerate
c) Remain at rest
d) Change direction

a) Accelerate

Which of Newton’s laws of motion explains the behavior of objects in equilibrium?
a) First law
b) Second law
c) Third law
d) None of the above

a) First law

The force required to keep an object moving with a constant velocity is equal to the force of __________.
a) Friction
b) Gravity
c) Inertia
d) Net force

a) Friction

In which direction does the frictional force act on a moving object?
a) Opposite to the direction of motion
b) In the same direction as the motion
c) Perpendicular to the direction of motion
d) Frictional force does not act on a moving object

a) Opposite to the direction of motion

The force of gravity acting on an object depends on its __________.
a) Mass
b) Volume
c) Density
d) Temperature

a) Mass

An object with a mass of 5 kg is subjected to a force of 15 N. What will be its acceleration?
a) 3 m/s^2
b) 20 m/s^2
c) 0.33 m/s^2
d) 75 m/s^2

c) 0.33 m/s^2

Which of the following is an example of an unbalanced force?
a) Pushing a car and it starts moving
b) Pushing a car and it remains at rest
c) Pushing a car and it decelerates
d) Pushing a car and it changes direction

a) Pushing a car and it starts moving

The tendency of an object to resist changes in its motion is known as __________.
a) Inertia
b) Acceleration
c) Velocity
d) Momentum

a) Inertia

Which of the following factors does NOT affect the frictional force between two surfaces?
a) Mass of the object
b) Nature of the surfaces
c) Temperature
d) Area of contact

a) Mass of the object

According to Newton’s third law of motion, when a person jumps off a boat onto the shore, the boat will move __________.
a) Towards the person
b) Away from the person
c) In the same direction as the person
d) The boat will not move

b) Away from the person

Which of the following statements is true about the motion of an object in equilibrium?
a) The net force is zero
b) The velocity is constant
c) The acceleration is zero
d) All of the above

d) All of the above

Which of the following statements is true about an object at rest?
a) The net force acting on it is zero
b) The velocity is zero
c) The acceleration is zero
d) All of the above

d) All of the above

Which of the following is an example of a contact force?
a) Magnetic force
b) Gravitational force
c) Electrostatic force
d) Frictional force

d) Frictional force

The force required to start an object moving from rest is called __________.
a) Static friction
b) Rolling friction
c) Sliding friction
d) Kinetic friction

a) Static friction

The mass of an object is a measure of its __________.
a) Volume
b) Weight
c) Inertia
d) Acceleration

c) Inertia

An object with a mass of 2 kg is subjected to a force of 10 N. What will be its acceleration?
a) 2 m/s^2
b) 5 m/s^2
c) 20 m/s^2
d) 0.2 m/s^2

b) 5 m/s^2

Which of the following statements is true about the relationship between force and acceleration?
a) Force is directly proportional to acceleration
b) Force is inversely proportional to acceleration
c) Force and acceleration are unrelated
d) Force and acceleration have a complex relationship

a) Force is directly proportional to acceleration

Which of the following is an example of circular motion?
a) A car moving in a straight line
b) A ball rolling down a hill
c) A satellite orbiting the Earth
d) A book falling off a table

c) A satellite orbiting the Earth

According to Newton’s second law of motion, the acceleration of an object is inversely proportional to its __________.
a) Mass
b) Velocity
c) Density
d) Area

a) Mass

Which of the following statements is true about an object in free fall?
a) The net force is zero
b) The acceleration is zero
c) The velocity is constant
d) The object experiences only gravitational force

d) The object experiences only gravitational force

Which of the following factors affects the gravitational force between two objects?
a) Mass of one object
b) Mass of both objects
c) Distance between the objects
d) All of the above

d) All of the above

Which of the following statements is true about the law of conservation of momentum?
a) Momentum is always conserved in collisions
b) Momentum is always conserved in explosions
c) Momentum is always conserved in both collisions and explosions
d) Momentum is not conserved in any situation

c) Momentum is always conserved in both collisions and explosions

The force experienced by an object due to the acceleration due to gravity is known as its __________.
a) Weight
b) Mass
c) Inertia
d) Friction

a) Weight

When two objects of different masses are dropped from the same height in a vacuum, they will reach the ground __________.
a) At the same time
b) With different velocities
c) With different accelerations
d) None of the above

a) At the same time

The force required to keep an object moving at a constant velocity on a horizontal surface is called __________.
a) Static friction
b) Rolling friction
c) Sliding friction
d) Kinetic friction

d) Kinetic friction

Which of the following statements is true about the coefficient of friction?
a) It depends on the area of contact between the surfaces
b) It is a dimensionless quantity
c) It determines the force of friction between two surfaces
d) All of the above

d) All of the above

An object is at rest on a horizontal surface. Which of the following statements is true?
a) The net force is zero
b) The acceleration is zero
c) The velocity is zero
d) All of the above

d) All of the above

Which of the following statements is true about the normal force?
a) It is always equal to the weight of an object
b) It acts perpendicular to the surface of contact
c) It depends on the mass of an object
d) All of the above

b) It acts perpendicular to the surface of contact

The acceleration due to gravity on the surface of the Earth is approximately __________.
a) 9.8 m/s
b) 9.8 m/s^2
c) 9.8 m/s^3
d) 9.8 m/s^4

b) 9.8 m/s^2

Which of the following statements is true about the relationship between mass and inertia?
a) Mass and inertia are directly proportional
b) Mass and inertia are inversely proportional
c) Mass and inertia are unrelated
d) Mass and inertia have a complex relationship

a) Mass and inertia are directly proportional

Which of the following statements is true about the acceleration of an object in free fall near the surface of the Earth?
a) It is constant
b) It increases with time
c) It decreases with time
d) It varies randomly

a) It is constant

The tendency of an object to continue moving with a constant velocity is known as __________.
a) Inertia
b) Acceleration
c) Velocity
d) Momentum

a) Inertia

Which of the following statements is true about the relationship between mass and weight?
a) Mass and weight are the same thing
b) Mass and weight are directly proportional
c) Mass and weight are inversely proportional
d) Mass and weight are unrelated

b) Mass and weight are directly proportional

An object with a mass of 2 kg is dropped from a height of 10 meters. What will be its velocity just before it hits the ground?
a) 10 m/s
b) 20 m/s
c) 30 m/s
d) 40 m/s

b) 20 m/s

Which of the following statements is true about the motion of an object experiencing uniform circular motion?
a) The object has constant speed but changing velocity
b) The object has constant velocity but changing speed
c) The object has constant speed and constant velocity
d) The object has changing speed and changing velocity

b) The object has constant velocity but changing speed

The force required to maintain the motion of an object in a circular path is called __________.
a) Centripetal force
b) Centrifugal force
c) Frictional force
d) Gravitational force

a) Centripetal force

An object with a mass of 5 kg is subjected to a force of 50 N. What will be its acceleration?
a) 0.1 m/s^2
b) 10 m/s^2
c) 100 m/s^2
d) 500 m/s^2

b) 10 m/s^2

Which of the following statements is true about the relationship between force and mass?
a) Force is directly proportional to mass
b) Force is inversely proportional to mass
c) Force and mass are unrelated
d) Force and mass have a complex relationship

a) Force is directly proportional to mass

An object is moving in a circular path with a constant speed. Which of the following statements is true?
a) The object is accelerating
b) The object is decelerating
c) The object is not accelerating
d) The object’s velocity is constant

a) The object is accelerating

The weight of an object can be calculated by multiplying its mass by the __________.
a) Acceleration due to gravity
b) Velocity
c) Frictional force
d) Net force

a) Acceleration due to gravity

The acceleration due to gravity is the same for all objects regardless of their __________.
a) Mass
b) Shape
c) Size
d) All of the above

d) All of the above

According to Newton’s first law of motion, an object in motion will continue moving at a constant velocity unless acted upon by an external __________.
a) Mass
b) Force
c) Energy
d) Power

b) Force

An object is pushed with a force of 10 N and experiences an acceleration of 2 m/s^2. What is its mass?
a) 5 kg
b) 8 kg
c) 10 kg
d) 12 kg

a) 5 kg

Which of the following statements is true about the relationship between force and acceleration?
a) Force and acceleration are directly proportional
b) Force and acceleration are inversely proportional
c) Force and acceleration are unrelated
d) Force and acceleration have a complex relationship

a) Force and acceleration are directly proportional

The force of gravity between two objects depends on their masses and the __________ between them.
a) Velocity
b) Acceleration
c) Distance
d) Time

c) Distance

Which of the following statements is true about the net force acting on an object in equilibrium?
a) The net force is zero
b) The net force is non-zero
c) The net force is always directed upwards
d) The net force is always directed downwards

a) The net force is zero

The force required to keep an object moving in a circular path is directed towards the __________ of the circle.
a) Center
b) Periphery
c) Bottom
d) Top

a) Center

An object with a mass of 5 kg is dropped from a height of 10 meters. What will be its potential energy just before it hits the ground?
a) 0 J
b) 50 J
c) 100 J
d) 500 J

c) 100 J

Which of the following statements is true about the relationship between force and momentum?
a) Force and momentum are directly proportional
b) Force and momentum are inversely proportional
c) Force and momentum are unrelated
d) Force and momentum have a complex relationship

a) Force and momentum are directly proportional

An object with a mass of 10 kg is subjected to a force of 100 N. What will be its acceleration?
a) 0.1 m/s^2
b) 1 m/s^2
c) 10 m/s^2
d) 100 m/s^2

b) 1 m/s^2

Which of the following statements is true about an object in projectile motion?
a) The object experiences a constant velocity
b) The object experiences a constant acceleration
c) The object experiences both horizontal and vertical motion simultaneously
d) The object experiences only vertical motion

c) The object experiences both horizontal and vertical motion simultaneously

The gravitational force between two objects is strongest when __________.
a) Their masses are large
b) Their masses are small
c) Their masses are equal
d) The distance between them is small

a) Their masses are large

An object is moving with a constant velocity of 10 m/s. Which of the following statements is true?
a) The object is accelerating
b) The object is decelerating
c) The object’s acceleration is zero
d) The object’s displacement is zero

c) The object’s acceleration is zero

According to Newton’s second law of motion, the acceleration of an object is inversely proportional to its __________.
a) Velocity
b) Density
c) Area
d) Mass

d) Mass

The force required to start an object moving from rest is called __________.
a) Static friction
b) Rolling friction
c) Sliding friction
d) Kinetic friction

a) Static friction

The force of friction depends on the nature of the surfaces in contact and the __________.
a) Mass of the object
b) Velocity of the object
c) Area of contact
d) Acceleration of the object

c) Area of contact

An object is thrown vertically upward. At the highest point of its trajectory, its velocity is __________.
a) Maximum
b) Minimum
c) Zero
d) Negative

c) Zero

The force of gravity between two objects is __________ proportional to the square of the distance between them.
a) Directly
b) Inversely
c) Not
d) Exponentially

b) Inversely

An object is moving in a circular path at a constant speed. Which of the following statements is true?
a) The object is accelerating
b) The object is decelerating
c) The object’s acceleration is zero
d) The object’s velocity is zero

a) The object is accelerating

The product of an object’s mass and velocity is called its __________.
a) Force
b) Momentum
c) Acceleration
d) Inertia

b) Momentum

According to Newton’s third law of motion, the forces of action and reaction __________.
a) Have the same magnitude
b) Have the same direction
c) Act on the same object
d) All of the above

d) All of the above

An object is pushed with a force of 10 N and experiences an acceleration of 5 m/s^2. What is its mass?
a) 2 kg
b) 5 kg
c) 10 kg
d) 50 kg

c) 10 kg

Which of the following statements is true about the law of inertia?
a) It states that objects in motion tend to stay in motion
b) It states that objects at rest tend to stay at rest
c) It is another name for Newton’s second law of motion
d) It is another name for Newton’s third law of motion

b) It states that objects at rest tend to stay at rest

An object is thrown horizontally from a height. Which of the following statements is true about its vertical motion?
a) The object experiences constant acceleration
b) The object experiences constant velocity
c) The object experiences constant speed
d) The object experiences no vertical motion

d) The object experiences no vertical motion

Which of the following statements is true about an object in uniform circular motion?
a) The object has constant speed but changing velocity
b) The object has constant velocity but changing speed
c) The object has constant speed and constant velocity
d) The object has changing speed and changing velocity

a) The object has constant speed but changing velocity

The force required to keep an object moving with a constant velocity is equal to the force of __________.
a) Friction
b) Gravity
c) Inertia
d) Net force

a) Friction

An object with a mass of 5 kg is subjected to a force of 15 N. What will be its acceleration?
a) 3 m/s^2
b) 5 m/s^2
c) 15 m/s^2
d) 75 m/s^2

b) 5 m/s^2

Which of the following statements is true about the relationship between force and acceleration?
a) Force is directly proportional to acceleration
b) Force is inversely proportional to acceleration
c) Force and acceleration are unrelated
d) Force and acceleration have a complex relationship

a) Force is directly proportional to acceleration

An object is moving with a constant velocity of 10 m/s. Which of the following statements is true?
a) The object is accelerating
b) The object is decelerating
c) The object’s acceleration is zero
d) The object’s displacement is zero

c) The object’s acceleration is zero

The force required to maintain the motion of an object in a circular path is called __________.
a) Centripetal force
b) Centrifugal force
c) Frictional force
d) Gravitational force