- #1

Om Swostik

## Homework Statement

2 projectiles are fired simultaneously from ground level with same initial speed (u).Both cover same horizontal distance of 160m on reaching the ground level .One of them reaches 6 sec prior to the other.Only gravitational acceleration g=10m/s squared governs the motion of both the projectile.Calculate u.[/B]

## Homework Equations

Range(horizontal distance)=u squared sin 2×theta/g= Ux cos theta ×time

Time=2u sin theta/g

Where ,

U is initial velocity

Theta is the angle of projection

and T is the time taken by the projectile to reach ground level.

Note:vector u has 2 components which are Ux=u cos theta and Uy=u sin theta