Two D Motion

Projectile Motion Video

To view the video in .wmv format, click here.

An object fired horizontally and an object dropped from the same height will hit the ground at the same time, because the horizontal and vertical motions are independent.

Split into x- and y- columns.

ax = 0, ay = -10 m/s2

If fired horizontally, voy = 0. If fired at an angle, split into v0x and v0y using sin and cos.

Voy at top = 0.

Velocity is tangent to the trajectory. Acceleration is always downward.

An angle of 45° results in the greatest horizontal distance.


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