Question

1. A boy throws a ball horizontally from the top of a building. The initial speed of the ball is 20 m/s. Find the vertical and horizontal components of its velocity.
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Answer 1

The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; its value is 9.8 m/s/s, down, The vertical velocity of a projectile changes by 9.8 m/s each second, The horizontal motion of a projectile is independent of its vertical motion.