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22 July, 17:30

A sprinkler sprays water out of a hose with a velocity of 6.3 m/s. if the sprinkler is aimed 25° above the ground, at what distance from the sprinkler does the water hit the ground? ignore air resistance and use 9.8 m/s2 for acceleration due to gravity.

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  1. 22 July, 20:04
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    The step by step solution would be:

    1. Look for the vertical component of spray, this is calculated by: (sin 25 degrees x 6.3) = 2.662 m/sec.

    2. Then look for the time to max height = (v/g) = 2.662/9.8 = 0.272 sec.

    3. Double the amount you got from 2; this is for time to reach the ground, = 0.544 sec.

    4. Then compute for the horizontal V of spray = (cos 25 degrees x 6.3) = 5.710 m/sec.

    5. So the horizontal distance = (5.710 x 0.544) = 3.106 meters.
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