Question

An object moving with a speed of 6.25 m/s is decelerated at a constant rate of a= - 2.5*v^1/2, where v is the instantaneous speed. find the time taken by the object to come to rest.

Answer 1

An object moving with a speed of 6.25 m/s is decelerated at a constant rate of a= - 2.5*v^1/2, where v is the instantaneous speed. find the time taken by the object to come to rest. 
 answer is 7.905

Answer 2

Ans is 2 sec. Solution is in pics