Homework Answers
Using law of conservation of energy,
0.5 mv^2 + 0.5 Iw^2 = mgHo
0.5 mv^2 + 0.5 (2/3) mr^2 (v/r)^2 = mg Ho
0.5 mv^2 + mv^2/3 = mg Ho
(5/6) mv^2 = mg Ho
(5/6) (2 mgH) = mgHo
H = (3/5) Ho
B)
It loses some of its potential energy in kinetic energy
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