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26 May, 10:17

A good baseball pitcher can throw a baseball toward home plate at 86 mi/h with a spin of 1530 rev/min. How many revolutions does the baseball make on its way to home plate

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  1. 26 May, 10:59
    0
    12.1 rev

    Explanation:

    The question seems incomplete. So for simplicity, we assume that the 60 ft trajectory is a straight line.

    First, find the time it takes to get the baseball to homeplate:

    t = S / V,

    where S is the distance traveled

    V is the velocity.

    t = 60 ft / 85 mi/h

    But 1 Mile = 5280 Feet

    Therefore

    t = 60 / (86 * 5280) = 0.0001321 hours

    Coverted to minutes

    t=hours*60min

    = 0.007928 min.

    Second, to calculate the number of revolutions made:

    N = t * n

    t is the time in minutes

    n is the number of spin/min

    = 0.007928 * 1530

    = 12.1300 = approx. 12.1 revolutions.

    Answer: 12.1 revolutions.
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