consider a cannonball projected horizontally by a cannon from the top of a very high cliff. What will happen to the horizontal velocity of the cannonball if the gravity is neglegted?
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Explanation:
If there were no gravity, the cannonball would continue in motion at 20 m/s in the horizontal direction. Yet in actuality, gravity causes the cannonball to accelerate downwards at a rate of 9.8 m/s/s.
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Projectile Motion Notes.
Time Horizontal Velocity Vertical Velocity
7 s 73.1 m/s, right 49.0 m/s, down
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