**38. A quarterback fires off a pass with the football traveling at a speed of 20 m/s and with a rotational speed of 5 revolutions per second. The mass of the football is 400 g and its rota- tional inertia is 2 x 10-3 kg m2 a) What is the total kinetic energy (translational plus rotational) of the football just as it is thrown? b) If the ball rises to a maximum height of 10 m above the point where it left the quarterback's hand, what will be its translational and rotational kinetic energies at that point? [Neglect any effects of air resistance.]

Question
**38. A quarterback fires off a pass with the football traveling at a speed of 20 m/s and with
a rotational speed of 5 revolutions per second. The mass of the football is 400 g and its rota-
tional inertia is 2 x 10-3 kg m2
a) What is the total kinetic energy (translational plus rotational) of the football just as it
is thrown?
b) If the ball rises to a maximum height of 10 m above the point where it left the
quarterback's hand, what will be its translational and rotational kinetic energies at that
point? [Neglect any effects of air resistance.]

Image Transcription

**38. A quarterback fires off a pass with the football traveling at a speed of 20 m/s and with a rotational speed of 5 revolutions per second. The mass of the football is 400 g and its rota- tional inertia is 2 x 10-3 kg m2 a) What is the total kinetic energy (translational plus rotational) of the football just as it is thrown? b) If the ball rises to a maximum height of 10 m above the point where it left the quarterback's hand, what will be its translational and rotational kinetic energies at that point? [Neglect any effects of air resistance.]

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