The initial velocity 'u' of a body moving along a straight line with constant retardation 'a' reduces by 75% in time 't'. What is the time taken in doing so?
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assuming acceleration to be negative .
then
-a = dv/dt
dt = (-3/4)(u)(-a)
t = (3/4)(u*a)
then
-a = dv/dt
dt = (-3/4)(u)(-a)
t = (3/4)(u*a)
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