A body having a uniform acceleration and some initial velocity attains a final velocity v m s−1 after travelling a distance of x m. If the equation v=180−7x gives the final velocity then the acceleration of the body is

v=180−7x where x is the distance∴v2=180−7xFrom the dimensions, 180 has dimensions of square of velocity. For a body travelling with uniform acceleration,Compare the above equation with the standard equation   V2=u2-2ax and find a