问题描述:
英文
A 89 mph slider thrown by NY Mets Ace Matt Harvey spins at a rate of
1900 rpm.(a) What is the angular momentum of the slider?(b) If it takes 0.06 s for him
to spin the ball from rest when he pitches,what is the torque he applies to the ball?A
baseball is 0.14 kg in mass and 9.25 inches in circumference.
A 89 mph slider thrown by NY Mets Ace Matt Harvey spins at a rate of
1900 rpm.(a) What is the angular momentum of the slider?(b) If it takes 0.06 s for him
to spin the ball from rest when he pitches,what is the torque he applies to the ball?A
baseball is 0.14 kg in mass and 9.25 inches in circumference.
问题解答:
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