Question

(11) A father has mass of 80 kg and the mass of his son is 40 kg. The ratio of the
inertia of the father to the inertia of his child is -
(e) 1:1
(1). 1:2
(g) 1:3
(h) 2:1​

Answer 1

80/40

8:4

4:2

2:1 so ratio will be 2:1

Answer 2

Answer:

The ratio of the inertia of father to his child is 2:1.

Explanation:

Given mass of father, $m_{F} = 80 kg$

mass of his son, $m_{S} =40 kg$

Inertia is defined as the tendency of a body to resist the change of its state of motion or rest.

And mass is the measure of inertia, hence inertia is proportional to mass.

Then, the ratio of the inertia of the father to his child is

$\frac{m_{F} }{m_{F}} =\frac{80 }{40} =\frac{2}{1}$

Therefore, the ratio of the inertia of the father to his child is 2:1.

So, the correct answer is option 4.