CBSE Class 11 Physics Chapter 5 Laws of Motion Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics Laws of Motion with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics Laws of Motion MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics Laws of Motion with Answers - Set - 5
Question 1:
Two stones of masses m and 2m are whirled in horizontal circles, the heavier one in a radius r/2 and the lighter one in radius r. The tangential speed of lighter stone is n times that of the value of heavier stone when they experience same centripetal forces.
The value of n is
(a) 4
(b) 1
(c) 2
(d) 3
Correct Answer – (C)
Question 2 :
Starting from rest, a body slides down a 45° inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is
(a) 0.80
(b) 0.75
(c) 0.25
(d) 0.33
Correct Answer – (D)
Question 3 :
Consider a car moving along a straight horizontal road with a speed of 72 km/h. If the coefficient of static friction between the tyres and the road is 0.5, the shortest distance in which the car can be stopped is (taking g = 10 m/s2)
(a) 30 m
(b) 40 m
(c) 72 m
(d) 20 m
Correct Answer – (B)
Question 4 :
On the horizontal surface of a truck a block of mass 1 kg is placed (m = 0.6) and truck is moving with acceleration 5 m/s2 then the frictional force on the block will be
(a) 5 N
(b) 6 N
(c) 5.88 N
(d) 8 N
Correct Answer – (A)
Question 5 :
A conveyor belt is moving at a constant speed of 2 m s–1. A box is gently dropped on it. The coefficient of friction between them is m = 0.5. The distance that the box will move relative to belt before coming to rest on it, taking g = 10 m s–2, is
(a) 0.4 m
(b) 1.2 m
(c) 0.6 m
(d) zero
Correct Answer – (A)
MCQ Questions Class 11 Physics Laws of Motion with Answers
Question 6 :
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m.
The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be (g = 10 m/s2)
(a) 10 p rad/s
(b) 10 rad/s
(c) 10 /2π rad/s
(d) 10 rad/s
Correct Answer – (D)
Question 7 :
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 one edge of the table is
(a) 20%
(b) 25%
(c) 35%
(d) 15%
Correct Answer – (A)
Question 8 :
A block has been placed on a inclined plane with the slope angle q, block slides down the plane at constant speed. The coefficient of kinetic friction is equal to
(a) sinq
(b) cosq
(c) g
(d) tanq
Correct Answer – (D)
Question 9 :
A block of mass 10 kg placed on rough horizontal surface having coefficient of friction m = 0.5, if a horizontal force of 100 N acting on it then acceleration of the block will be
(a) 10 m/s2
(b) 5 m/s2
(c) 15 m/s2
(d) 0.5 m/s2
Correct Answer – (B)
Question 10 :
Which one of the following statements is incorrect?
(a) Rolling friction is smaller than sliding friction.
(b) Limiting value of static friction is directly proportional to normal reaction.
(c) Frictional force opposes the relative motion.
(d) Coefficient of sliding friction has dimensions of length.
Correct Answer – (D)
- NCERT Solutions Class 11 Physics Chapter 1 : Physical world
- NCERT Solutions Class 11 Physics Chapter 2 : Units And Measurements
- NCERT Solutions Class 11 Physics Chapter 3 : Motion In A Straight Line
- NCERT Solutions Class 11 Physics Chapter 4 : Motion In A Plane
- NCERT Solutions Class 11 Physics Chapter 5 : Laws of Motion
- NCERT Solutions Class 11 Physics Chapter 6 : Work Energy Power
- NCERT Solutions Class 11 Physics Chapter 7 : Rotational-Motion
- NCERT Solutions Class 11 Physics Chapter 8 : Gravitation
- NCERT Solutions Class 11 Physics Chapter 9 : Mechanical Properties of Solids
- NCERT Solutions Class 11 Physics Chapter 10 : Mechanical Properties of Fluids
- NCERT Solutions Class 11 Physics Chapter 11 : Thermal Properties of Matter
- NCERT Solutions Class 11 Physics Chapter 12 : Thermodynamics
- NCERT Solutions Class 11 Physics Chapter 13 : Kinetic Theory
- NCERT Solutions Class 11 Physics Chapter 14 : Oscillations
- NCERT Solutions Class 11 Physics Chapter 15 : Waves
