A particle is thrown upwards from ground. It experiences a constant air resistance which can produce a retardation of 2 m/s 2 opposite to the direction of velocity of particle. The ratio of time of ascent to the time of descent is: [ g = 10 m/s 2 ]
A
1 : 1
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Let a be the retardation produced by resistive force, t a and t d be the time of ascent and time of descent respectively. If the particle rises upto a height h then
h = 
(g + a) t a2 and h = 
(g – a) t d 2
∴ 
= 
= 
= 
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