Homework Answers
Ans: At t = 2 seconds
Because v is max when Kinetic Energy is max. KE is maximum at bottom and decreases as you go away from x axis. When you go in +y direction, KE is +ve. So v is + maximum at t =2 seconds.
at mean position velocity is maximum
now particle is at mean position at t=2 and t=4
but its going up at 2s hence positive
and hence maxium positive velocity at t=2s
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