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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​
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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​

User Ritesh Khandekar
by
4.9k points

1 Answer

3 votes

Answer:

b. 20 sec

Step-by-step 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.

User Keith John Hutchison
by
5.4k points
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