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11 April, 18:22

A ball thrown vertically upwards with an initial speed of 30m/s from the top of a cliff falls into the water 10seconds later directly below the cliff. Find

1. How high the ball went above the cliff

2. How high the cliff is, neglecting air resistance

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Answers (2)
  1. 11 April, 19:41
    0
    1. about 15 feet

    2 depending the force of the air resictance, it could be many answers
  2. 11 April, 21:57
    0
    1. KEi = PEf

    (1/2) m (30) ^2 = m (10) h

    h=45m
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