The figure is a graph of the gravitational potential energy and kinetic energy of a 70 g yo-yo as it moves up and down on its string. The acceleration of gravity is 9.81 m/s2 .
a) By what amount does the mechanical energy of the yo-yo change
after 6.0 s? Answer in units of J.
b) What is the speed of the yo-yo after 4.5 s? Answer in units of
m/s.
c) What is the maximum height of the yo-yo? Answer in units of
m.
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