Will mark as BRAINLIEST-. A balloon is ascending at the rate of 4.9 m/s. A packet is dropped from from the balloon when situa

Question

Will mark as BRAINLIEST…..

A balloon is ascending at the rate of 4.9 m/s. A packet is dropped from from the balloon when situated at a height of 100m.
How long does it take the packet to reach the ground ?
What is it’s final velocity ?

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Thông Đạt 6 months 2021-08-10T20:04:30+00:00 1 Answers 23 views 0

Answers ( )

    0
    2021-08-10T20:05:34+00:00

    Answer: initially the packet was ascending up with the balloon.

    Taking upward as positive direction;

    initial velocity, u = 4.9 m/s

    final velocity = v m/s

    initial height, h₁ = 245 m  

    final height, h₂ = 0

    a = -9.8 m/s²

    time taken = t seconds

    s = ut + 0.5at²

    ⇒ (h₂-h₁) = ut + 0.5at²

    ⇒ 0-245 = 4.9t + 0.5×(-9.8)×t²

    ⇒ -245 = 4.9t – 4.9t²

    ⇒ 4.9t² -4.9t -245 =0

    Solving it, we get  t = 7.59s

    v = u + at = 4.9 -9.8×7.59 = 4.9 – 74.38 = -69.48 m/s

    So velocity is 69.48 m/s downward

    Explanation:

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