Rotational kinetic energy
Repeat the previous problem with the merry-go-round initially rotating at 1.0 rad/s opposite the direction that the boy was running before he jumped on it.
Repeat the previous problem with the merry-go-round initially rotating at 1.0 rad/s in the same direction that the boy is running.
previous problem - Merry-go-round A 40-kg boy running at 4.0 m/s jumps tangentially onto a small stationary circular merry-go-round of radius 2.0 m and rotational inertia 80 kg . m2 pivoting on a frictionless bearing on its central shaft. (a) Determine the rotational velocity of the merry-go-round after the boy jumps on it. (b) Find the change in kinetic energy of the system consisting of the boy and the merry-go-round. (c) Find the change in the boy’s kinetic energy. (d) Find the change in the kinetic energy of the merry-go-round. (e) Compare the kinetic energy changes in parts (b) through (d).
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