Slender uniform rod 100 cm long is used as a meter stick. Consider twoparallel axes that are perpendicular to the rod. The first axis passes throughthe 50-cm mark and the second axis passes through the 30-cm mark. Whatis the ratio of the moment of inertia through the second axis to the momentof inertia through the first axis?

The  ratio of the moment of inertia through the second axis to the moment of inertia through the first axis is 1.48.

Explanation:

Given that,

Length of rod = 100 cm

The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark.

We need to calculate the moment of inertia when the axis passing through

Using formula of moment of inertia

Put the value into the formula

We need to calculate the distance from center of mass

We need to calculate the moment of inertia when the axis passing through

Using formula of moment of inertia

Put the value into the formula

We need to calculate the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis

Using formula of ration of moment of inertia

Hence, The  ratio of the moment of inertia through the second axis to the moment of inertia through the first axis is 1.48.

v=ir = 3x15 =45 v

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this