Question 15

1. A particle is projected vertically upwards from the ground with speed 30 ms-1. 
   Calculate the :  

   (i) maximum height reached by the particle;

   (ii) time taken by the particle to return to the ground;

   (iii) time(s) taken for the particle to attain a height of 40 m above the ground.

               [Take g = 10 ms-2]