What if a solid cylinder of mass M = 2.50 kg, radius R = 2.18 cm, and length L = 2.7 cm, is rolling down from rest instead? With h = 79.60 m and x = 4.64 m, what is the center of mass velocity when the cylinder reaches the bottom?

The center of mass velocity is  

Explanation:

From the question we are told that

          The mass of the cylinder is  

            The radius  is  

             The length is  

              The height of the plane is  h  = 79.60  m

               and the distance covered is  

The center of mass velocity o the cylinder when it reaches the bottom is mathematically represented as

substituting values  

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.

like poles repel so keep pushing north to north and repels funny to see this