# Laws of Motion MCQ Questions for Class 11 Physics Chapter 5 with Answers

NCERTCOURSE.COM given here the NCERT chapter-wise Multiple Choice Questions from Class 11 Physics book Chapter 5 Laws of Motion with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Laws of Motion. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

## Q1. A bird dismounts on a stretched telegraph wire. The additional tension produced in the wire is

(i) zero
(ii) equal to the weight of the bird
(iii) greater than the weight of the bird
(iv) less than the weight of the bird

(iii) greater than the weight of the bird

## Q2. A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained

(i) by Newtons first law
(ii) by Newtons second law
(iii) by Newtons third law
(iv) by the principle of conservation of momentum

(i) by Newtons first law

## Q3. Out of the basic forces , gravitational force

(i) ranks first in strength
(ii) ranks second in strength
(iii) ranks third in strength
(iv) ranks fourth in strength

(iv) ranks fourth in strength

## Q4. If two masses (M & m) are connected on a horizontal plane and a force is applied on the combination, then the tension T depends on

(i) whether force is applied on M or m
(ii) the force applied on the system
(iii) Can’t be predicted.
(iv) None of these

(i) whether force is applied on M or m

## Q5. A car sometimes overturns while taking a turn. When it overturn, it is

(i) the inner wheel, which leaves the ground first
(ii) the outer wheel, which leaves the ground first
(iii) both the wheels leaves the ground simultaneously
(iv) either wheel, which leave the ground first

(i) the inner wheel, which leaves the ground first

## Q6. The mass of a body which is equal to the ratio of the force acting on a body to the acceleration produced in the body is

(i) the gravitational mass
(ii) the electromagnetic mass
(iii) the internal mass
(iv) the inertial mass

(iv) the inertial mass

(i) 1 m/s²
(ii) 1.2 m/s²
(iii) 1.6 m/s²
(iv) 1.8 m/s²

(iii) 1.6 m/s²

## Q8. When an elevator cabin falls down, the cabin and all the bodies fixed in the cabin are accelerated with respect to

(i) man standing on earth
(ii) ceiling of elevator
(iii) floor of elevator
(iv) man standing in the cabin

(i) man standing on earth

(i) 120 kg/s
(ii) 180 kg s-1
(iii) 45 kg/s
(iv) 90 kg/s

(ii)

(i) 20%
(ii) 25%
(iii) 30%
(iv) 35%

(i) 20%

(i) 15 m/s²
(ii) 3 m/s²
(iii) 10 m/s²
(iv) 5 m/s²

(iii) 10 m/s²

## Q12. The direction of impulse is

(i) same as that of the net force
(ii) opposite to that of the net force
(iii) same as that of the final velocity
(iv) same as that of the initial velocity

(i) same as that of the net force

##### Q13. A jet of water of cross-sectional area ‘a’ strikes a wall at angle θ with the wall and rebounds elastically with the same speed v. If density of water be p, then the normal thrust on the wall will be

(i) av²p sin θ
(ii) 2av²p sin θ
(iii) 2av²p cos θ
(iv) av²p cos θ

(ii) 2av²p sin θ

(i) 5 m/s
(ii) 0 .1 m/s
(iii) 15 m/s
(iv) 20 m/s

(ii) 0 .1 m/s

## Q15. A block of wood is placed on a surface. A force is applied parallel to the surface to move the body. The frictional force developed acts

(i) normal to the surface upwards
(ii) normal to the surface downwards
(iii) along the direction of the applied force
(iv) opposite to the direction of the applied force

(iv) opposite to the direction of the applied force

## Q16. Physical independence of force is a consequence of

(i) first law of motion
(ii) third law of motion
(iii) second law of motion
(iv) all of these

(i) first law of motion

## Q17. A body is placed on an inclined plane and has to be pushed down. The angle made by the normal reaction with the vertical will be

(i) equal to the angle of friction
(ii) more than the angle of friction
(iii) equal to the angle of repose
(iv) less than the angle of repose

(iv) less than the angle of repose

(i) 24 m/s²
(ii) 6 m/s²
(iii) 14 m/s²
(iv) 10 m/s²

(ii) 6 m/s²

(i) 1.95
(ii) 2.78
(iii) 3.47
(iv) 4.6

(ii) 2.78

## Q20. Newton’s first law of motion describes the

(i) inertia
(ii) energy
(iii) work
(iv) moment of inertia

(i) inertia

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