A rock was dropped off a cliff from rest. It accelerated downward at 9.8m/s2 and it hits the ground 4.6 seconds later. Neglecti

Question

A rock was dropped off a cliff from rest. It accelerated downward at 9.8m/s2
and it hits the ground 4.6 seconds later. Neglecting air resistance. what is the
rocks velocity when it hits the ground?

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Hải Đăng 3 years 2021-07-16T01:52:25+00:00 1 Answers 9 views 0

Answers ( )

  1. Maris
    0
    2021-07-16T01:53:58+00:00
    Reply

    Answer:

    45.1 m/s

    Explanation:

    use the equation v = u + at

    substitute the values v = 0 + 9.8×4.6

    v = 45.08

    round to 3 s.f v = 45.1 m/s

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