Given :
Initial velocity , u = 15 m/s .
Final velocity , v = 30 m/s .
Distance travelled , d = 40 m .
Also , this body is uniformly accelerating .
To Find :
(a) What is the acceleration .
(b) How long does this take .
Solution :
Let , acceleration be a .
By , equation of motion :
Also , by equation :
Hence , this is the required solution .