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Subject: Physics, asked on 22/4/18

When a sphere rolls down an inclined plane, then identify the correct statement related to the work done by friction force.
(A) The friction force does positive translational work.
(B) The friction force does positive rotational work.
(C) The net work done by friction is zero.
(D) All of the above

Subject: Physics, asked on 22/4/18

A loop and a disc have same mass and roll without slipping with the same linear velocity V .if the total kinetic energy of the loop is 8 Joule. the kinetic energy of the disc must be
a) 6J b)8J. c)12J. d)16J

Subject: Physics, asked on 16/3/18

four equal masses m lie at the corners of a rectangle of width a and length b. Where is the center of mass ?

Subject: Physics, asked on 1/6/17

On what principle of physics is a fidget spinner based on ?

Subject: Physics, asked on 19/5/17

What happens to angular velocity of a disk if an ice cube is kept on it and rotated(ice melts)

Subject: Physics, asked on 30/3/17

A child  of mass m  is standing  on the periphery of a circular  plateform  of radius R,  which  can rotate  about  its central axis .  the moment of inertia  of the platform is l . child  jump off  from the  platform . Find  the angular  speed of the platform  after the child  jump off.
 

Subject: Physics, asked on 18/3/17

The moment of inertia of a disc is 5*10-4 kg.m2. It is rotating freely about a vertical axis passing through its centre at a speed of 40 rpm. A piece of wax of mass 20 g is attached at a distance of 8 cm from its centre. Calculate its new speed.

[ Answer : 32 rpm ]

NO LINKS PLEASE

Subject: Physics, asked on 18/3/17

The moment of inertia of a wheel of radius 0.2 m about an axis passing through its centre is 0.1 kg.m2. It is now allowed from rest to roll down a plane inclined at 30o. What will be its angular velocity after it rolls down a distance of 2 m along the inclined plane ? Given, mass of the disc = 5 kg.

[Answer : 18.07 rad.s-1]

NO LINKS PLEASE

Subject: Physics, asked on 18/3/17

A rope remains wrapped over the circumference of a wheel of radius r and of moment of inertia I about its axis. If a mass m is suspended from the lower end of the rope, what will be the angular acceleration of the wheel ?

[Answer : mgr / (I + mr2) ]

NO LINKS PLEASE

Subject: Physics, asked on 23/11/16

the moment of inertia of two equal masses each of mass m at seperation l connected by a rod of mass M about an axis passing through centre and perpendicular to length of rod is

Subject: Physics, asked on 17/11/15

at the end points of light rod(pivoted at centre) two masses of 5kgand 2kgare hanged. what is angular acclerationof rod.(for torque I considered force to be 50-5a , 20 +2anot their weights only.) Why my step is wrong

Subject: Physics, asked on 1/2/23

Dear experts kindly answer the following question

Subject: Physics, asked on 21/1/23

Pls give solution of this question

Subject: Physics, asked on 29/11/22

. Derive the relation = dL/dt

Subject: Physics, asked on 2/8/22

Please answer the first passage

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