Initial & Final Velocity on X-Axis: Why Equal?

Thread starter Aspekt
Start date Nov 20, 2005
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Projectile

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SUMMARY

The discussion centers on the relationship between initial and final velocity on the X-axis in projectile motion, specifically under the influence of Earth's gravity. It is established that the force causing acceleration is the downward pull of gravity, which results in equal initial and final velocity values along the X-axis. The acceleration components in other directions are zero, reinforcing this equality. This principle is crucial for understanding projectile motion dynamics.

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Understanding of basic physics concepts, particularly projectile motion.
Familiarity with Newton's laws of motion.
Knowledge of gravitational force and its effects on objects in motion.
Basic mathematical skills for calculating velocity and acceleration.

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Nov 20, 2005

Aspekt

As far as motion on the X-Axis, why typically are the initial velocity and final velocity values the same?

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Nov 20, 2005

lightgrav

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because the Force that causes acceleration (in projectile motion)
is the pull of Earth's gravity applied to the projectile.
This Force is Downward (by definition!) so the acceleration is, too.
So the other two acceleration components are zero.