Question

wheel of mass 4 kg and radius of gyration 0.4 metre is making 300 r.p.m its moment of inertia is

a) 6.4 kgm2
b) 0.64 kgm2
c) 0.32 kgm2
d) 64 kgm2 ​

Answer 1

Answer:

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Answer 2

Answer:The moment of inertia is 0.64kgm² i.e.option(b).

Explanation:

The moment of inertia is calculated as,

$I=MK^2$    (1)

Where,

I=moment of inertia of the body

M=mass of the body

K=radius of gyration

From the question we have,

The mass of the wheel=4kg

The radius of gyration of the wheel=0.4m

By using equation (1) we get;

$I=4\times (0.4)^2$

$I=0.64\ kgm^2$

Hence, the moment of inertia is 0.64kgm² i.e.option(b).

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