CBSE Class 11 Physics Chapter 7 System of Particles and Rotational Motion Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics System of Particles and Rotational Motion with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics System of Particles and Rotational Motion MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics System of Particles and Rotational Motion with Answers - Set - 3
Question 1:
A particle of mass m = 5 is moving with a uniform speed v =3 √2 in the XOY plane along the line y = x + 4. The magnitude of the angular momentum of the particle about the origin is
(a) 60 units
(b) 40 2 units
(c) zero
(d) 7.5 units
Correct Answer – (A)
Question 2 :
When a mass is rotating in a plane about a fixed point, its angular momentum is directed along
(a) a line perpendicular to the plane of rotation
(b) the line making an angle of 45° to the plane of rotation
(c) the radius
(d) the tangent to the orbit.
Correct Answer – (A)
Question 3 :
Question. Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be
(a) 2v
(b) zero
(c) 1.5v
(d) 3v
Correct Answer – (B)
Question 4 :
The centre of mass of system of particles does not depend on
(a) position of the particles
(b) relative distances between the particles
(c) masses of the particles
(d) forces acting on the particle
Correct Answer – (B)
Question 5 :
Three masses are placed on the x-axis : 300 g at origin, 500 g at x = 40 cm and 400 g at x = 70 cm. The distance of the centre of mass from the origin is
(a) 40 cm
(b) 45 cm
(c) 50 cm
(d) 30 cm
Correct Answer – (A)
MCQ Questions Class 11 Physics System of Particles and Rotational Motion with Answers
Question 6 :
A particle of mass m moves in the XY plane with a velocity v along the straight line AB. If the angular momentum of the particle with respect to origin O is LA when it is at A and LB when it is at B, then
(a) LA = LB
(b) the relationship between LA and LB depends upon the slope of the line AB
(c) LA < LB
(d) LA > LB
Correct Answer – (A)
Question 7 :
A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 m/s. When the stone reaches the floor, the distance of the man above the floor will be
(a) 9.9 m
(b) 10.1 m
(c) 10 m
(d) 20 m
Correct Answer – (B)
Question 8 :
Two persons of masses 55 kg and 65 kg respectively, are at the opposite ends of a boat. The length of the boat is 3.0 m and weighs 100 kg. The 55 kg man walks up to the 65 kg man and sits with him. If the boat is in still water the center of mass of the system shifts by
(a) 3.0 m
(b) 2.3 m
(c) zero
(d) 0.75 m
Correct Answer – (C)
Question 9 :
Three identical metal balls, each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed when centres of three balls are joined. The centre of the mass of the system is located at
(a) line joining centres of any two balls
(b) centre of one of the balls
(c) horizontal surface
(d) point of intersection of the medians.
Correct Answer – (A)
Question 10 :
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The centre of mass of the system from the 5 kg particle is nearly at a distance of
(a) 33 cm
(b) 50 cm
(c) 67 cm
(d) 80 cm
Correct Answer – (C)
- 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
