Isaac throws an apple straight down from a tree with an initial speed of 5.0 \dfrac{\text m}{\text s}5.0 s m ​ 5, point, 0, start fractio

Question

Isaac throws an apple straight down from a tree with an initial speed of 5.0 \dfrac{\text m}{\text s}5.0 s m ​ 5, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. It hits the ground with a final speed of 12 \dfrac{\text m}{\text s}12 s m ​ 12, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. How many seconds did the apple fall?

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Kim Chi 5 years 2021-08-31T10:06:58+00:00 2 Answers 117 views 0

Answers ( )

  1. lethu
    0
    2021-08-31T10:08:07+00:00
    Reply

    Answer:

    0.71s

    Explanation:

    From Newton’s law of motion ;

    V =U +gt

    V is the final velocity or speed

    U is the initial velocity or speed

    g is acceleration of free fall due to gravity given as 9.8m/S2

    Note when a body moves horizontally down its said to do so with the aid of the force of gravity

    Hence the final velocity is aided by gravity.

    From the above formula;

    t =V-U/ g

    t= 12-5/ 9.8 = 0.71s

  2. Cherry
    0
    2021-08-31T10:08:43+00:00
    Reply

    Answer: .71

    Explanation:

    Khan academy

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