Question

How to do a, b, and c?

Answer 1

This is a basic projectile based question   now intial vel is u Ux( initial vel in x direction) =ucosø Uy=usinø  since there is no force in the horizontal direction Vx( vel in x direction at any instant)= ucosø  since there is g present opposite to the initial Uy direction  Vy= usinø-gt  i expained b part above only   c) maginitude you can calculate by taking the resultant of Vx and Vy  direction will be given by  tan∅= Vy/Vx    if you find any further doubt comment