Eugene B.
asked • 12/13/21Rody hit a serve measured at 153 mi / h. How much work was required by Andy to serve a 2-oz tennis ball at that speed?
If possible, apply concepts from 'Applications of Definite Integrals' in Calculus.
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1 Expert Answer
No need for the Calculus as the work will equal the kinetic energy of the ball or 1/2mv2. The mass of the ball is 2/16/32.2 = .003882 slugs and the speed = 153*3600/5280=104 feet/second. Thus the work = .5*.003882*1042 = 21.1 ft-lbs
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Eugene B.
This question is drawn from a Calculus chapter on applications of definite integrals, 'work and fluid force'.12/13/21