Question

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PLZZZ HELP IN MY Q'S
CLASS 11
ITS VERY URGENT
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EXPLAIN PROPERLY⏩⏩

Answer 1

Let  us  assume  a  wheel as  shown in  figure, and  24rod spokes  in it.

Find  the moment  of  inertia of  wheel,

Mass of  wheel = 24M

Radius  of  wheel = L

We know  that, a  wheel having  mass of   m and  radius  r , has  inertia  equal to mr²

Hence,

Moment  of  inertia of wheel = mass of wheel ×( radius)²

                                                = 24M × (L)²

                                                 = 24ML²

Find  the  moment  of  inertia of rods,

First  we need  to find  mass of inertia of one rod,

mass of one  = M

lenght of one  rod = L

Inertia of  one  rod = 1/3×ML²

Inertia of 24 rods = 24 × ML²/3

                             = 8ML²

Moment of inertia  of  Whole wheel = 24ML² + 8ML² = 32ML²

Answer 2

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