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

Students are advised to practice the NCERT MCQ Questions for Class 11 Physics Chapter 5 Laws of Motion with Answers Pdf free download is available here. MCQ Questions for Class 11 Physics with Answers are prepared as per the Latest Exam Pattern. Students can solve these Laws of Motion Class 11 MCQs Questions with Answers and assess their preparation level.

## Laws of Motion Class 11 MCQs Questions with Answers

Solving the Laws of Motion Multiple Choice Questions of Class 11 Physics Chapter 5 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Laws of Motion Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 5 Physics Class 11 and cross-check your answers during preparation.

Question 1.
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downwards with an acceleration of 5 m/s, the reading of the spring balance will be
(a) 15 N
(b) 24 N
(c) 49 N
(d) 74 N

Answer

Answer: (b) 24 N

Question 2.
Two forces 6 N and 8 N act at a point O. If the angle between the lines of action of the force is 90°, then their resultant is
(a) 14 N
(b) 12 N
(c) 10 N
(d) 48 N

Answer

Answer: (c) 10 N

Question 3.
A body of mass 15 kg moving with a velocity of 10 m/s has its velocity reduced to 6 m/s in two seconds. The force that produced this change in velocity is
(a) 60 N
(b) 30 N
(c) 45 N
(d) 20 N

Answer

Answer: (b) 30 N

Question 4.
The frame of reference attached to a satellite of the earth is
(a) an inertial frame
(b) an absolute frame at rest with respect to the stars
(c) a non – inertial frame
(d) a gravitational frame

Answer

Answer: (c) a non – inertial frame

Question 5.
A machine gun fires a bullet of mass 40 g with a velocity of 1200 ms-1. The man holding it can exert a maximum force on 144 N on the gum. How many bullets can he fire per second at the most?
(a) one
(b) four
(c) two
(d) three

Answer

Answer: (d) three

Question 6.
A block of mass M is placed on a flat surface. A force is applied to move it parallel to the surface. The frictional force f developed is proportional to the
(a) square of the mass of the body
(b) mass of the body
(c) reciprocal of the mass of the body
(d) reciprocal of the square of the body

Answer

Answer: (b) mass of the body

Question 7.
A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained
(a) by Newtons first law
(b) by Newtons second law
(c) by Newtons third law
(d) by the principle of conservation of momentum

Answer

Answer: (a) by Newtons first law

Question 8.
A rocket with a lift-off mass of 3.5 × 10 kg is blasted upwards with an acceleration of 10 m/s². The initial thrust of the blast is (take g = 10 m/s²)
(a) 1.75 × 105N
(b) 3.5 × 105N
(c) 7.0 × 105N
(d) 14 .0 × 105N

Answer

Answer: (c) 7.0 × 105N

Projectile motion calculator finds the initial and final velocity, initial and final height, maximum height, horizontal distance

Question 9.
A gun of mass 1000 kg fires a projectile of mass 1 kg with a horizontal velocity of 100 m/s. The velocity of recoil of the gun in the horizontal direction is
(a) 5 m/s
(b) 0.1 m/s
(c) 15 m/s
(d) 20 m/s

Answer

Answer: (b) 0.1 m/s

Question 10.
A body is sliding down a rough inclined plane which makes an angle of 30 degree with the horizontal. If the co-efficient of friction is 0.26, the acceleration in m/s² is
(a) 1.95
(b) 2.78
(c) 3.47
(d) 4.6

Answer

Answer: (b) 2.78

Question 11.
A block of mass M is placed on a flat surface. A force is applied to move it parallel to the surface. The frictional force f developed is proportional to the
(a) square of the mass of the body
(b) mass of the body
(c) reciprocal of the mass of the body
(d) reciprocal of the square of the body

Answer

Answer: (b) mass of the body

Question 12.
A force of 12 N acts on a body of mass 2 kg. The acceleration produced on the body is
(a) 24 m/s²
(b) 6 m/s²
(c) 14 m/s²
(d) 10 m/s²

Answer

Answer: (b) 6 m/s²

Question 13.
The mass of a body is 2 kg. It weight is
(a) 19.6 N
(b) 20 N
(c) 30 N
(d) 40 N

Answer

Answer: (a) 19.6 N

Question 14.
A gun of mass 1000 kg fires a projectile of mass 1 kg with a horizontal velocity of 100 m/s. The velocity of recoil of the gun in the horizontal direction is
(a) 5 m/s
(b) 0 .1 m/s
(c) 15 m/s
(d) 20 m/s

Answer

Answer: (b) 0 .1 m/s

Question 15.
A body of mass 15 kg moving with a velocity of 10 m/s has its velocity reduced to 6 m/s in two seconds. The force that produced this change in velocity is
(a) 60 N
(b) 30 N
(c) 45 N
(d) 20 N

Answer

Answer: (b) 30 N

Degree and Leading Coefficient Calculator. The calculator will find the degree, leading coefficient, and leading term of the given polynomial function.

Question 16.
A heavy uniform chain lies on horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25, then the maximum fraction of the length of the chain that can hang over the edge of the table is
(a) 20%
(b) 25%
(c) 30%
(d) 35%

Answer

Answer: (a) 20%

Question 17.
A body is sliding down a rough inclined plane which makes an angle of 30 degree with the horizontal. If the co-efficient of friction is 0.26, the acceleration in m/s² is
(a) 1.95
(b) 2.78
(c) 3.47
(d) 4.6

Answer

Answer: (b) 2.78

Question 18.
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
(a) the gravitational mass
(b) the electromagnetic mass
(c) the internal mass
(d) the inertial mass

Answer

Answer: (d) the inertial mass

Question 19.
A machine gun fires a bullet of mass 40 g with a velocity of 1200 ms-1. The man holding it can exert a maximum force on 144 N on the gum. How many bullets can he fire per second at the most?
(a) one
(b) four
(c) two
(d) three

Answer

Answer: (d) three

Question 20.
A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained
(a) by Newtons first law
(b) by Newtons second law
(c) by Newtons third law
(d) by the principle of conservation of momentum

Answer

Answer: (a) by Newtons first law

Hope the information shared regarding the NCERT MCQ Questions for Class 11 Physics Chapter 5 Laws of Motion with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 11 Physics Laws of Motion MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.

error: Content is protected !!