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21 April, 04:35

2. A body is thrown vertically upward with a speed of 100 m/s. The time taken to be

the earth is

a. 10 sec

b. 20 sec

c. 15 sec

d. 5 sec

+5
Answers (1)
  1. 21 April, 06:14
    0
    b. 20 sec

    Explanation:

    y = y₀ + v₀ t + ½ g t²

    0 = 0 + (100) t + ½ (-10) t²

    0 = 100t - 5t²

    0 = t (100 - 5t)

    t = 0, t = 20

    The body lands after 20 seconds.
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