Homework Answers
As the track is frictionless, the mechanical energy is conserved,
PE initial = PE final + KE final
PE initial = mgh
PE final = mgh1
KE final = 1/2 mv^2
mgh = mgh1 +1/2mv^2
h = h1 +v^2/2g
h = 0.5+16/(2*9.8) = 1.316 m
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