An expensive carbon weave 5-spoke bike wheel has total mass M and radius R. If half the mass of the wheel is in the spokes, what is this wheel's moment of inertia?

I =

Explanation: Moment of Inertia (I) is the opposition on a rotating body. Generally, is calculated by  

A bycicle wheel is composed of numerous parts and each part has its own moment of inertia.

Moment of inertia for this 5-spoke bike wheel will be:

Inertia of ring:

For the 5-spoke wheel:

Inertia of spokes:

where

n is the number of spokes

For the 5-spoke wheel, half of the total mass is the spokes, then:

Inertia of the wheel is the sum of both inertia:

The moment of inertia of the 5-spoke bike wheel is

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

i think the answer would be reserve.