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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​

Respuesta :

MathPhys

Answer:

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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