Question

If a ball is kicked horizontally off of a building at 8.0 m/s, what is the horizontal velocity (vx) after 3

Answer 1

The characteristics of the projectile launch allows to find the result for the velocity on the x axis is:

• In the horizontal axis there is no acceleration and therefore the speed must be kept constant.

• The horizontal speed is  vₓ = 8.0 m / s

In projectile launching we have an application of kinematics to motion in two dimensions near the surface of the Earth.

In this case, on the vertical axis we have an acceleration directed towards the center of the planet and called the gravity acceleration.

In the horizontal axis or x axis there is not acceleration, except in special cases that we tone is how much the resistance of the air.

Consequently in the horizontal axis there is no acceleration and therefore the speed must be kept constant, the result for the horizontal speed is:

           vₓ = 8.0 m / s

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