- #1

thushanthan

- 32

- 0

**Projectile motion...?**

## Homework Statement

An artillery shell is fired with an initial velocity of 300 m/s at 55 degrees above the horizontal. It explodes on mountainside 42 s after firing. If x is horizontal and y is vertical, find the (x,y) co-ordinates where shell explodes?

## Homework Equations

## The Attempt at a Solution

I used r

_{f}=r

_{i}+v

_{v}t+1/2 at

^{2}

where r

_{i}=0

v

_{i}=300 m/s

a=-9.8

t=42-0=42s

and theta = 55 degrees ...

I want to know whether my way is correct ? If it is wrong please provide any suggestions... I don't need the full solution...