A body from the top of a 180 m high mountain is abandoned. Disregarding air resistance and adopting g = 10m / s2, determine: 1)

Question

A body from the top of a 180 m high mountain is abandoned. Disregarding air resistance and adopting g = 10m / s2, determine:

1) the time used by the body to reach the ground;
2) the speed of the body when reaching the ground

in progress 0
Diễm Kiều 4 years 2021-08-17T03:42:13+00:00 1 Answers 5 views 0

Answers ( )

  1. Neala
    0
    2021-08-17T03:43:54+00:00
    Reply

    Answer:

    1) 6 seconds

    2) 60 m/s

    Explanation:

    Given:

    Δy = 180 m

    v₀ = 0 m/s

    a = 10 m/s²

    1) Find t.

    Δy = v₀ t + ½ at²

    180 m = (0 m/s) t + ½ (10 m/s²) t²

    t = 6 s

    2) Find v.

    v² = v₀² + 2aΔy

    v² = (0 m/s)² + 2 (10 m/s²) (180 m)

    v = 60 m/s

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )