The figure below shows the motion of a particle, under the influence of gravity only.

Define the following variables:

We are assuming no air resistance. So the particle travels exactly as it would while in a vacuum. Thus, we have the following equations describing the motion of a particle (projectile) in the absence of air resistance:

Note that the horizontal velocity

Note that the above equations are a direct result of applying the equations of rectilinear motion using constant vertical acceleration in the downward direction (

To see an interesting application of projectile motion go to The Physics Of Volleyball.

I created a simulator which accounts for the effect of air resistance for projectile motion problems. To find out more about this simulator see Projectile Motion Simulator.

If you want to test your understanding and solve some problems go to Projectile Motion Problems.

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