- #1

physicos

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## Homework Statement

A projectile is launched at a 60° angle above the horizontal on level ground. The change in its velocity between launch and just before landing is found to be Δv

^{→}= v

^{→}

_{landing}_ v

^{→}

_{launch}= -20 y

^{^}m/s .

What is the initial velocity of the Projectile ?

What is its final velocity just before landing ?

## Homework Equations

Δv

^{→}= v

^{→}

_{landing}_ v

^{→}

_{launch}= -20 y

^{^}

m/s .

**3.The attempt at a solution**

I considered :

V

_{o}x - V

_{f}x = 0 and V

_{o}y - V

_{f}y = -20

knowing that V²

_{f}y - V²

_{o}y= -2g (Y

_{f}-Y

_{o}) But I couldn't go further

## Homework Statement

## Homework Equations

## The Attempt at a Solution

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