Motion Questions with solutions MCQs

1. Kmph is the unit to measure

A

speed

B

acceleration

C

momentum

D

mass

Motion General Science
Correct Answer : A
Explanation :

speed = distance / time
speed = km / hr
speed = kmph

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2. Motion of a pendulum is an example of

A

Linear motion

B

Circular motion

C

Rotational motion

D

Periodic motion

Motion General Science
Correct Answer : D
Explanation :

A simple pendulum consists of a relatively massive object hung by a string from a fixed support. It typically hangs vertically in its equilibrium position. The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position. The motion is regular and repeating, an example of periodic motion.

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3. When a fan is switched off, it continues to rotate for some time before coming to rest. This is due to

A

Force of acceleration

B

Inertia of motion

C

Inertia of rest

D

Inertia of direction

Motion General Science
Correct Answer : B
Explanation :

Newton`s first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.

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4. Physical independence of forces is a consequence of

A

1st law of motion

B

2nd law of motion

C

3rd law of motion

D

all of the above

Motion General Science
Correct Answer : A
Explanation :

Physical independence of forces is a consequence of

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5. If the net force acting on an object is zero, then the body is known to be in the state of

A

motion

B

uniform motion

C

equillibrium

D

inertia motion

Motion General Science
Correct Answer : C
Explanation :

Equilibrium
The state of a body at rest or in uniform motion, the resultant of all forces on which is zero.

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6. The scientist who said that an object in motion will remain in same motion as long as no external force is applied is

A

Newton

B

Dalton

C

Galileo

D

Aristotle

Motion General Science
Correct Answer : A
Explanation :

Isaac Newton`s First Law of Motion describes the behavior of a massive body at rest or in uniform linear motion, i.e., not accelerating or rotating. The First Law states, A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.

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7. The inertia of a body depends on its

A

volume

B

mass

C

area

D

shape

Motion General Science
Correct Answer : B
Explanation :

inertia is the nature of the body to resist the change in its state and mass is the amount of matter in the body. Inertia of the body depends on the mass of the body.

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8. A freely falling body under the pull of the Earth has a

A

Random acceleration

B

Infinite acceleration

C

Variable acceleration

D

Uniform acceleration

Motion General Science
Correct Answer : D
Explanation :

This gravitational force is due to the uniform acceleration due to gravity which is considered constant near the surface of the earth and is equal to g = 10m / s2. Thus a freely falling body falls with the uniform acceleration and so it has non zero velocity or the velocity keeps on increasing.

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9. The distance travelled by an object in a specified direction is

A

Displacement

B

Acceleration

C

Velocity

D

Speed

Motion General Science
Correct Answer : A
Explanation :

The distance travelled by an object in a specific direction is called displacement. Displacement is a vector quantity. This means that it can be defined only when proper magnitude and direction are mentioned.

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10. What is the product of mass and velocity of an object?

A

Momentum

B

Impulse

C

Acceleration

D

Centrifugal force

Motion Health Educator set 1
Correct Answer : A
Explanation :

Linear momentum is defined as the product of a system`s mass multiplied by its velocity. In symbols, linear momentum is expressed as p = mv. Momentum is directly proportional to the object`s mass and also its velocity. Thus the greater an object`s mass or the greater its velocity, the greater its momentum.

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11. Which of the following illustrates Newton`s Third Law of Motion?

A

AC Generator

B

Hydrogen spectral series

C

Recoiling force of gun

D

X-Ray

Motion Health Educator set 1
Correct Answer : C
Explanation :

The launching of a rocket,Recoiling force of gun and fielder pulling his hand back while catching a ball illustrates Newton`s third law of motion.

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