NEET Physics Systems of Particles and Rotational Motion MCQs Set A

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MCQ for Full Syllabus Physics Systems of Particles and Rotational Motion

Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Systems of Particles and Rotational Motion in Full Syllabus.

Systems of Particles and Rotational Motion MCQ Questions Full Syllabus Physics with Answers


Question:  For which of the following does the centre of mass lie outside the body?

a) A bangle

b) A dice

c) A shotput

d) A pencil

Answer: A bangle

 

Question:  Which of the following points is the likely position of the centre of mass of the system shown in figure?

a) C

b) D

c) B

d) A

Answer: C

 

Question:   A particle of mass m is moving in yz-plane with a uniform velocity v with its trajectory running parallel to +ve y-axis and intersecting z-axis at z = a in figure. The change in its angular momentum about the origin as it bounces elastically from a wall at y = constant is

a)

b)

c)

d)

Answer:

 

Question:  When a disc rotates with uniform angular velocity, which of the following is not true?

a) The angular acceleration is non-zero and remains same

b) The speed of rotation is non-zero and remains same

c) The orientation of the axis of rotation remains same

d) The sense of rotation remains same

Answer: The angular acceleration is non-zero and remains same

 

Question:  A uniform square plate has a small piece Q of an irregular shape removed and glued to the centre of the plate leaving a hole behind in figure. The moment of inertia about the zaxis is then

a) decreased

b) increased

c) changed in unpredicted manner

d) the same

Answer:  decreased

 

Question:   In problem-5, the CM of the plate is now in the following quadrant of x-y plane.

a) III

b) IV

c) II

d) I

Answer:  III

 

Question:

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c)

d)

Answer:

 

Question:   The ratio of the accelerations for a solid sphere (mass ‘m’ and radius ‘R’) rolling down an incline of angle ‘q’ without slipping and slipping down the incline without rolling is :

a) 5 : 7

b) 2 : 3

c) 2 : 5

d) 7 : 5

Answer: 5 : 7

 

Question:  A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions s– 2 is

a) 157 N

b) 78.5 N

c) 50 N

d) 25 N

Answer:  157 N

 

More Questions.....................................

 

Question:  A wheel is rolling straight on ground without slipping. If the axis of the wheel has speed v, the instantenous velocity of a point P on the rim, defined by angle q, relative to the ground will be

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c)

d)

Answer:

 

Question:   Three identical spherical shells, each of mass m and radius r are placed as shown in figure. Consider an axis XX' which is touching to two shells and passing through diameter of third shell. Moment of inertia of the system consisting of these three spherical shells about XX' axis is

a)

b)

c)

d)

Answer:

 

Question:  A rod of weight W is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c)

d)

Answer:

 

Question:

a) –1

b) 1

c) zero

d) 2

Answer:  –1

 

Question:   An automobile moves on a road with a speed of 54 km h-1. The radius of its wheels is 0.45 m and the moment of inertia of the wheel about its axis of rotation is 3 kg m2. If the vehicle is brought to rest in 15s, the magnitude of average torque transmitted by its brakes to the wheel is:

a) 6.66 kg m2 s-2

b) 10.86 kg m2 s-2

c) 8.58 kg m2 s-2

d) 2.86 kg m2 s-2

Answer: 6.66 kg m2 s-2

 

Question:  From a solid sphere of mass M and radius R a cube of maximum possible volume is cut. Moment of inertia of cube about an axis passing through its center and perpendicular to one of its faces is :

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c)

d)

Answer:

 

Question:  Distance of the centre of mass of a solid uniform cone from its vertex is z0. If the radius of its base is R and its height is h then z0 is equal to :

a)

b)

c)

d)

Answer:

 

Question:  A disk and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?

a) Sphere

b) Disk

c) Both reach at the same time

d) Depends on their masses

Answer: Sphere

 

Question:  A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of 2.0 rad s–2. Its net acceleration in ms–2 at the end of 2.0s is approximately :

a) 8.0

b) 7.0

c) 6.0

d) 3.0

Answer: 8.0

 

Question:   From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?

a) 13 MR2/32

b) 9 MR2/32

c) 15 MR2/32

d) 11 MR2/32

Answer:  13 MR2/32

 

Question:  Consider a thin uniform square sheet made of a rigid material. If its side is ‘a’ mass m and moment of inertia I about one of its diagonals, then

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c)

d) None of these

Answer:

 

Question:

a)

b)

c)

d)

Answer:

 

Question:   A roller is made by joining together two cones at their vertices O. It is kept on two rails AB and CD, which are placed asymmetrically (see figure), with its axis perpendicular to CD and its centre O at the centre of line joining AB and Cd (see figure). It is given a light push so that it starts rolling with its  centre O moving parallel to CD in the direction shown. As it moves, the roller will tend to :

a) turn left.

b) turn right

c) turn left and right alternately

d) go straight.

Answer:  turn left.

 

Question:

a)

b)

c)

d)

Answer:

 

Question:  Which of the following statements are correct ?
(A) Centre of mass of a body always coincides with the centre of gravity of the body
(B) Centre of mass of a body is the point at which the total gravitational torque on the body is zero
(C) A couple on a body produce both translational and rotation motion in a body
(D) Mechanical advantage greater than one means that small effort can be used to lift a large load

a) (B) and (D)

b) (B) and (C)

c) (A) and (B)

d) (C) and (D)

Answer:  (B) and (D)

 

Question:

a)

b)

c)

d)

Answer:

 

MCQs for Systems of Particles and Rotational Motion Physics Full Syllabus

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