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This mock test of Rigid Body Dynamics MCQ Level - 2 for Physics helps you for every Physics entrance exam.
This contains 10 Multiple Choice Questions for Physics Rigid Body Dynamics MCQ Level - 2 (mcq) to study with solutions a complete question bank.
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QUESTION: 1

A uniform equilateral prism of mass * m* rests on a rough horizontal surface with coefficient of friction

Solution:

The tendency of rotation will be about the point ** C**. For minimum force, the torque of

QUESTION: 2

Two points of a rod move with velocities 3* v* and

Solution:

*v*_{rel} bring the velocity of one point w.r.t. other

and ** r** being the distance between them

= 2/vr

The correct answer is: 2v/r

QUESTION: 3

Two identical uniform solid spherical balls ** A** and

Solution:

Just before collision between two balls

potential energy lost by Ball ** A** = kinetic energy gained by Ball

After collision only translational kinetic energy is transferred to ball **B**

So just after collision rotational kinetic energy of Ball

QUESTION: 4

A uniform ring of radius ** R** rolls without sliding. The radius of curvature of the path followed by any particle of the ring at the highest point of its path will be :

Solution:

The correct answer is: 4*R*

QUESTION: 5

A uniform thin rod of mass * m* and length

Solution:

Immediately after string connected to end ** B** is cut, the rod has tendency to rotate about point

Alternative

Applying Newton's law of centre of mass

* mg* –

Writing about centre of mass

From (1), (2) and (iii)

The correct answer is: 3g/2L

QUESTION: 6

A uniform ring of radius ** R** is given a back spin of angular velocity

Solution:

Here * u* =

_{}

At pure rolling :

The correct answer is: *V*_{0}/4

QUESTION: 7

A uniform triangular plate ** ABC** of mass

Solution:

QUESTION: 8

A uniform rod of mass ** M** and length

Solution:

Moment of inertia of the rod about w.r.t. the axis through centre of the disc 1 to the plane line is : (by parallel axis theorem).

QUESTION: 9

In the figure shown, a small solid spherical ball of mass * m* can move without sliding in a fixed semicircular track of radius

Solution:

From conservation of energy, the kinetic energy of ball at lowest portion is (** v_{c}** = speed of centre of ball)

Since net tangential force on sphere at lowest point is zero, net force on sphere at lowest position is

QUESTION: 10

A uniform thin rod of length 4* l*, mass

Solution:

The given structure can be broken into 4 parts

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