Question

solve 3rd question please help?

Answer 1

Given,

The  displacement x of  a  particle at any  point is related  to velocity as,

$v=\sqrt{2x+9}$

$v^2=2x+9\\\;\\v^2-9=2x\\\;\\v^2-3^2=2x$

On comparing  with third  equation of  motion , $v^2-u^2=2as$

$2a=2\\\;\\a=1\;m/s^2$

Here  a  is  the  acceleration of  particle, u is  initial velocity and  v is  final velocity. s=x displacement  of  particle.

Answer 2

Check above Attachment !!