A ball is trough vertically upward with an initially velocity of 49m/so. In how much time will the ball reach the maximum height? (g=98m/s2)
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Answer: 5 seconds.
Explanation:
Given in the attachment.
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Explanation:
Initial velocity (u) = 49 m/s Final velocity (v) = 0 m/s
Gravity in toward down = + 9.8 m/s2 Gravity in toward up = - 9.8 m/s2
(i) We know, V2 - u2 = 2gs
or, (o)2- (49)2 = 2 X 9.8 X S
or, s = - (49)2/ 2 X 9.8 = 122.5 m
Maximum height = 122.5 m
(ii) We know, v = u + gt
or 0 = 49 +(- 9.8) X t
or 9.8 X t = 49
or, t = 49/ 9.8 = 5 s
If, time for upward direction = time for downward direction
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