<p>A cannonball is fired horizontally from the top of a cliff . The cannon is at

Question

<p>A cannonball is fired horizontally from the top of a cliff . The cannon is at hight H=60.0m above ground level , and the ball is fired with initial horizontal speed V<span>₀</span>&#160;, assume acceleration due to gravity to be g=9.80ms<span>²</span></p>
<p>&#160;</p>
<p>find D in term of V<span>₀</span></p>
<p><span><br /></span></p>

Explanation / Answer

height = 1/2 gt^2

t = [2 h /g] = [2*60m/9.8,m/s/s]

= 3.5s

the horizontal velocity does not change during the flight since there are no horizontal forces, therefore

D = V*time

D = V*3.5

So D/2 = 3.5V/2

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