A helicopter is traveling with a velocity of 12 m/s directly upward. Directly below the helicopter is a very large and very soft

Question

A helicopter is traveling with a velocity of 12 m/s directly upward.

Directly below the helicopter is a very large and very soft pillow.

As it turns out, this is a good thing, because the helicopter is lifting

a large man. When the man is 20 m above the pillow, he lets go of

the rope. What is the greatest height reached by the man above

the ground?

in progress 0
Khang Minh 5 years 2021-07-14T07:18:15+00:00 1 Answers 14 views 0

Answers ( )

  1. thienan
    0
    2021-07-14T07:19:46+00:00
    Reply

    Answer:

    H = 27.35 m

    Explanation:

    From projectile motion, we know that;

    h = (v_o)²/2g

    Where;

    v_o = 12 m/s

    g = 9.8 m/s²

    Thus;

    h = 12²/(2 × 9.8)

    h = 144/19.6

    h = 7.35 m

    Now, we are told that when the man is 20 m above the pillow, he lets go of

    the rope.

    Thus, greatest height reached by the man above the ground is;

    H = 20 + h

    H = = 20 + 7.35

    H = 27.35 m

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