Question

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Answer 1

Answer:

Given,

Take initial velocity u=9.8m/s

Acceleration is downward a=−g=−9.8m/s2

When the body come to the ground, it has equal velocity in magnitude but opposite in direction.

Final velocity v=−u

Apply kinematic equation

v=u+at

−u=u−gt

$t = 2u \div g$

$2 \times 9.8 \div 9.8$

=>

$2sec$

Answer 2

Answer:

1. 2 sec.
2. Option C is the answer.

Explanation:

Hope it helps you..Please mark this answer as the brainliest.