1.

A point initially at rest moves along x-axis. Its acceleration varies with time as `a = (6t + 5) m//s^(2)`. If it starts from origin, the distance covered in 2 s is:A. 20 mB. 28 mC. 16 mD. 25 m

Answer» Correct Answer - B
`(dv)/(dt) = (6t + 5)`
`int_(0)^(v) dv = (6t^(2))/(2) + 5t`
`v = 3 t^(2) + 5t`
`(dx)/(dt) = 3 t^(2) + 5t`
`x = t^(3) + 5 t^(2)`


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