contestada

A pitcher has the ability to throw a baseball at 95 mph.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 sepa- rated by 60 ft? c. If the batter wanted a full second to make a decision, what would the speed in mph have to be?

Respuesta :

Speed = 95 miles per hour

a. to express it in feet per second

1 mile = 5280 ft

1 hour = 3600 seconds

(95 x 5280 )/3600 = 139.33 ft/s

b. Speed = distance / time

Time = Distance / speed

Distance = 60ft

Time = 60ft / 139.33 ft /s = 0.43 seconds

c.

speed= distance / time

S = 60 ft / 1 sec = 60 ft/s

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