Question

A ball is thrown up vertically returns to the thrower after 6s . Find
a. The velocity with which it was thrown up
b. The maximum height it reaches.
c. It's position after 6s

Answer 1

I hope the method to solve is clear for you. Regarding the value of 'g', yes you can take its value as 10 for ease of calculation. It is your choice as to choose which value. In some qestions, it'll be seperately given as (take g=9.8). In such questions, you must use g = 9.8