Circuit Analysis Textbook Problems(Chp1 Prb 7) PDF

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Chapter 1...

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Chapter 1, problem 7; A pitcher has the ability to throw a baseball at 95mph. a) How fast is the speed in ft/s? b) How long does the hitter have to make a decision about swinging at the ball if the plate and the mound are separated by 60 ft?

c) If the batter wanted a full second to make a decision, what would the speed in mph have to be? SOL: a) Speed = 95 mph 1mi = 5280ft 95mi = 95 * 5280 ft Speed in ft/sec =

(95)(5280 ft ) (60)(60)

b) d = 60 ft Speed =

d t 60 ft

139.33 ft/sec = time

Time =

60 =0.431 s 139.33

c) Time = 1 sec Speed =

d isplacement t ime

= 40.91mph

= 139.33 ft/s...