Initial velocity of a partial moving with constant acceleration a = - 10j m/s^2 is u = (20i +10j) m /s its speed at t =3 is 

Asked by arushidabhade | 21st Jul, 2019, 07:52: PM

Expert Answer:

if v is final velocity after t seconds and u is initial velocity, we have v = u+a t  , where a is acceleration
hence velocity v at t = 3 s ,   v = (20i+10j) -(10j)×3  = ( 20i - 20j  )  m/s2

Answered by Thiyagarajan K | 22nd Jul, 2019, 10:44: AM

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