please i want the answer for this question. 1) Starting from rest, a basketball

Question

please i want the answer for this question.
1) Starting from rest, a basketball rolls from the topto the bottom of a hill, reaching a translational speed of 7.9 m/s.Ignore frictional losses. (a) What is the heightof the hill? (b) Released from rest at the sameheight, a can of frozen juice rolls to the bottom of the same hill.What is the translational speed of the frozen juice can when itreaches the bottom? please i want the answer for this question.
1) Starting from rest, a basketball rolls from the topto the bottom of a hill, reaching a translational speed of 7.9 m/s.Ignore frictional losses. (a) What is the heightof the hill? (b) Released from rest at the sameheight, a can of frozen juice rolls to the bottom of the same hill.What is the translational speed of the frozen juice can when itreaches the bottom?

Explanation / Answer

   Here   mgh =0.5mv2
   or gh= 0.5 v2
   or    h = (0.5 *(7.9)2)/9.8 = 3.184 m
.
b) As the object is releasing from the sameheight .    m g h = 0.5 m v2         v = sqrt(2 g h) = sqrt(2 * 9.8 *3.184) = 7.90 m/s

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