21. Take the uniform acceleration near the surface of earth to
be 9.8 ms for a free-fall. What is the velocity of a body at
the end of two second of free-fall, if the initial velocity is
zero ?
a) 9.8 mst
b) 19.6 msi
c) 3 x 9.8 ms
d) 4 x 9.8 msi
Answers
Answered by
1
Answer:
Answer. We know that acceleration due to gravity on earth = 9.8 m s–2 ... earth. Answer. Given, initial velocity, u = 49 m/s. The final velocity, v = 0, when it achieves the maximum
Answered by
1
Answer:
b. 19.6 m/s
Explanation:
since, v = u + at
0 + 9.8 * 2 = 19.6
therefore,
the answer is 19.6 m/s
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