Question 1

While driving, seat belt is a must. Which of the following options explains the reason behind this?

Newton's law of gravitation
Newton's second law of motion
Newton's third law of motion
Newton's first law of motion
Law of momentum

Answer

Correct Option: D

Question 2

When a horse starts suddenly, the rider falls backwards. Which of the following reasons is true for this reaction?

Due to the inertia of rest of the upper part of the rider's body
Due to the inertia of rest of the upper part of the horse's body
Due to the inertia of rest of the lower part of the rider's body
Due to the inertia of rest of the lower part of the horse's body
Due to the backward push of the air

Answer

Correct Option: A

Question 3

Which of the following laws is also known as the 'LAW OF INERTIA'?

Law of momentum conservation
Law of conservation of energy and matter
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion

Answer

Correct Option: C

Question 4

If external force is equal to zero, velocity of the body

gradually decreases
becomes zero
remains constant
gradually increases
increases and then decreases

Answer

Correct Option: C

Question 5

Directions: In a match between India and Pakistan, Misbah was caught out by Sreekant. Assertion(A): Sreekant lowered his hand while taking the catch. Reason(R): So that the ball and his height match.

Which of the following options regarding the above (A) and (R) are correct?

Both A and R are true and R explains A correctly.
Both A and R are false.
A is true, but R is false.
Both A and R are true, but R does not explain A correctly.
A is false, but R is true.

Answer

Correct Option: C

Question 6

According to the second law of motion, unbalanced forces cause the body to accelerate. The acceleration of an object depends upon

(a) net force acting on it (b) gravity (c) mass of the object (d) speed of the object

a and b
a and c
b and c
c and d
b and d

Answer

Correct Option: B

Question 7

In Newton's third law of motion, which of the following statements is false regarding action and reaction?

Both should act on the same objects.
Both should have equal magnitude.
Both should act on the different objects.
Both should act in opposite directions.
None of these

Answer

Correct Option: A

Question 8

Directions: Gopal and his son were in their car. When a cow suddenly came in front of the car, Gopal had to immediately apply the brakes. Assertion(A): A moving car stopped with a jerk, the driver slipped forward, hit the steering and got injured. Reason(R): The driver stayed in motion with the same speed and in the same direction due to inertia of rest.

Which of the following options regarding the above (A) and (R) is correct?

Both A and R are true and R is the correct reason for A.
A is true, but R is false.
Both A and R are true, but R is not the correct reason for A.
Both A and R are false.
A is false, but B is true.

Answer

Correct Option: B

Question 9

Why does a long jumper run before taking a leap?

He gains energy to take him through the long distance.
It helps him to apply large force.
By increasing his action, he improves his reaction.
To give his body larger inertia of motion, which is in rest
To improve his blood circulation

Answer

Correct Option: D

Question 10

Which of the following forces is acting in the given examples?

Force applied by foot on hitting a football
Force applied by boxer on a punching bag
Force applied by bat on a ball in hitting it to the boundary
Force applied by a moving truck on a drum

Gravitational force
Impulsive force
Frictional force
Tension force
Applied force

Answer

Correct Option: B

Question 11

What will be the acceleration of a rain drop falling freely with a constant speed?

It will be less than the speed.
It will be zero.
It will be more than the speed.
It will be equal to the speed.
It is directly proportional to the mass of the object.

Answer

Correct Option: B

Question 12

Which of the following options is the maximum value of static friction, which comes into play when the body is just on the point of sliding?

Dynamic friction
Rolling friction
Maximum friction
Limiting friction
None of these

Answer

Correct Option: D

Question 13

A boy is playing with a stone tied to a string by whirling it round. Suddenly the string breaks. In which direction will the stone fall?

It will fall down at the place where the boy is standing.
It will fall outwards away from the boy.
It will fall tangentially to the path of stone.
It will go very high, double the diameter of the circle.
It will fall inside the circle in which it was moving.

Answer

Correct Option: C

Question 14

Which of the following statements is/are false regarding the limiting force of static friction?

(a) It is independent of the area of the surfaces. (b) It depends on the material of the surface in contact. (c) It is the minimum value of static friction.

Only a
Only c
Both b and c
Both a and c
Both a and b

Answer

Correct Option: B

Question 15

When a rocket moves in space in a straight line with a constant speed, it is far from the gravitational effect of any star or planet. Which of the following forces must be applied to the rocket to sustain its motion?

Force equal to the weight of the rocket
Force equal to the mass of the rocket
Force equal to the speed of the rocket
No external force is required
Force equal and opposite to the gravity of the earth

Answer

Correct Option: D

Description: Newton's law of motion
Number of Questions: 15
Created by: Rani Rajan
Tags: motion momentum Law of Inertia Newton-s First Law of Motion Second Law of Motion Newton-s Second Law of Motion Action-Reaction Forces Newton-s Laws of Motion Laws of Motion Dynamics of Particle

Laws of Motion

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