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If the acceleration of the stone during its motion is 5 m/s2 in the downward direction, what will be the height attained by the stone and how much time will it take to reach there?
A: Height = 1.25 m and time = 0.5 s
B: Height = 2.5 m and time = 0.5 s
C: Height = 2.5 m and time = 0.05 s
D: Height = 1.25 m and time = 0.05 s
Given, initial velocity, u = 5ms-1
Final velocity, u = 0
Therefore, a = - 10ms-2
Height attained by stone, s = ?
Time take to attain height, t = ?
(i) Using the relation,
(ii) Using the relation,
Hence, option A is correct