Motion of a Projectile:
Projectile motion is motion under the influence of gravity. If we stand at the edge of the roof of the Science Building and throw a ball up at an angle, it moves up and then down vertically while it moves horizontally.This is projectile motion.Watch Motion of a Projectile to learn more.
To better understand this projectile motion, let’s move back and then look at it through the eyes of two different and special observers.
What is the motion seen by a far-distant observer on the ground
This observer is far enough away she has lost depth perception but can clearly see the ball rise and fall. She observes free fall, just as if the ball were thrown straight up. This is vertical motion with constant acceleration.
What motion is seen by an observer overhead? This overhead observer is high enough that he has lost depth perception but can clearly see the ball move horizontally. He observes horizontal motion with constant velocity.
Projectile motion, then, is a combination of vertical motion with constant acceleration (free fall that we have already discussed) and horizontal motion with constant velocity (which we also understand).
Subject : Physics
Lesson : Gravitation
Topic:Motion of a Projectile
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