Question

A father has a mass 60kg and the mass of his sson is 30kg find the ratio of the inertia of father to to inertia of his child

Answer 1

Explanation:

Mass of father=60kg

Mass of his son=30 kg

Therefore, ratio of their father to his son=60kg/30kg=1/2

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Answer 2

Given:

A father has a mass 60kg and the mass of his son is 30kg.

To find:

Ratio of inertia of father to son ?

Calculation:

• Inertia is a physical quantity which is directly proportional to the mass of an object.

• $I \propto \: m$

Now, required ratio is :

$\dfrac{I_{father}}{I_{son}} = \dfrac{ m_{father}}{ m_{son}}$

$\implies \dfrac{I_{father}}{I_{son}} = \dfrac{ 60}{ 30}$

$\implies \dfrac{I_{father}}{I_{son}} = \dfrac{ 2}{1}$

$\implies I_{father} : I_{son}= 2 : 1$

So , required ratio is 2 : 1.