SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

The figure shows a uniform rod lying along the -axis. The locus of all the points lying on the  plane, about which the moment of inertia of the rod is same as that , is

a)

Anellipse

b)

A circle

c)

A parabola

d)

A straight line


Question ID - 100196 :-

The figure shows a uniform rod lying along the -axis. The locus of all the points lying on the  plane, about which the moment of inertia of the rod is same as that , is

a)

Anellipse

b)

A circle

c)

A parabola

d)

A straight line

1 Answer
5876 Votes
3537

Answer Key : (b) -

(b)

Let us take any point  on  plane. The MI of the rod about  is

Hence ,

MI of the rod about

Applying  we get an equation of a circle



Next Question :

A cord is wrapped on a pulley (disk) of mass  and radius as shown in Figure. To one end of the cord, a block of mass  is connected as shown and to other end in (a) a force of 2  and in (b) a block of mass .Let angular acceleration of the disk in and is and , respectively, then (cord is not slipping on the pulley)

a)

b)

c)

d)

None of these


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