Question

the displacement y of a body varies with time t as: y=[(2/3)t^2]+16t+2 .how long does the body take to come to rest?

Answer 1

12 jst differenciate it once and equate it to zero

Answer 2

the answer we get is -12 and time can never be negative there must be some way to reach da right answer i.e 12 and not -12