# A cannon fires a cannonball 500m downrange when set at a 45 degree angle. At what velocity does the cannonball leave the cannon?

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Nov 1, 2016

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Let the velocity of the cannonball be u m/s.The angle of projection being

If T be the time of flight then we can write net vertical displacement during this time will be zero.

The horizontal displacement during this time i.e the range will be

Given

So

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