Systems of Particles and Rotational Motion Test

Result

Systems of Particles and Rotational Motion Test - 86

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Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

The moment of inertia of a uniform rod about a perpendicular axis passing through one of its ends is I₁. The same rod is bent in to a ring and its moment of inertia about a diameter is I₂. Then I₁/I₂

A

B

C

D

Solution
Question 3
4 / -1

A uniform disc of mass 500kg and radius 2 m is rotating at the rate of 600 r.p.m. what is the torque required to rotate the disc in the opposite direction with the same angular speed in a time of 100 sec ?

A
600πNm

B
500πNm

C
400πNm

D
300πNm

Solution
Question 4
4 / -1

How much constant force should be applied tangential to equator of the earth to stop its rotation in one day ?

A

B

C

D
None of these

Solution
Question 5
4 / -1

A disc of mass M and radius R is rolling with angular speed w on a horizontal plane, as shown in figure. The magnitude of angular momentum of the disc about the origin O is ______

A

B

C

D

Solution
Question 6
4 / -1

A mass m is moving with a constant velocity along the line parallel to the x-axis, away from the origin. Its angular momentum with respect to the origin

A
Zero

B
remains constant

C
goes on increasing

D
goes on decreasing

Solution
Question 7
4 / -1

A body is rolling down an incline plane. If the rotational K.E. of the body is 40% of its translational K.E. then the body is ....

A
ring

B
Cylinder

C
solid sphere

D
hollow sphere

Solution
Question 8
4 / -1

A binary star consist of two stars A (2.2 Ms) and B(mass 11Ms) where Ms is the mass of sun. They are separated by distance d and are rotating about their centre of mass, which is stationary. The ratio of the total angular momentum of the binary star to the angular momentum of star B. about the centre of mass is _____.

A
6

B
1/4

C
12

D
1/2

Solution
Question 9
4 / -1

A
ring

B
solid sphere

C
disc

D
hollow sphere

Solution
Question 10
4 / -1

A particle of mass m slides down on inclined plane and reaches the bottom with linear velocity V. If the same mass is in the form of ring and rolls without slipping down the same inclined plane. Its velocity will be______.

A
V

B

C

D

Solution