An object is thrown upwards with a velocity of 3 meters per second, such that the only force acting on it is gravity (acceleration is -9.8).

Question

An object is thrown upwards with a velocity of 3 meters per second, such that the only force acting on it is gravity (acceleration is -9.8). What will the object’s velocity be after 2 seconds?

A.) -16.6 meters per second (down)
B.) 16.6 meters per second (up)
C.) -22.6 meters per second (down)
D.) 22.6 meters per second (up)
E.) 3 meters per second (up)

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Nho 4 years 2021-07-30T20:21:33+00:00 2 Answers 73 views 0

Answers ( )

  1. minhkhang
    0
    2021-07-30T20:23:25+00:00
    Reply

    The answer is A. DOWN

  2. Nho
    0
    2021-07-30T20:23:31+00:00
    Reply

    Answer:

    Correct answer:  A.)  V = – 16.6 m/s down

    Explanation:

    Given:

    V₀ = 3 m/s  initial velocity

    t = 2 seconds

    g = 9.8 m/s²

    V(t) = V(2) = ?

    The movement described is a vertical upward shot

    For velocity at any time is valid the next formula

    V = V₀ – g · t

    V = 3 – (9.8 · 2) = 3 – 19.6 = – 16.6 m/s down

    Under condition that it has a enough drop height with respect to the ejection point.

    God is with you!!!

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