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Projectile Motion
When we play baseball, how do we play the ball?
The path for baseball is projectile.
What's the reason behind the movement of the baseball?
Ball play with projectile motion
Analyze projectile motion, and describe the force on the baseball with the direction of the motion.
A projectile is any object that moves through the air or space, acted on only by gravity. Projectiles near the surface of Earth follow a curved path that at first seems rather complicated.
The horizontal component of motion for a projectile is just like the horizontal motion of a ball rolling freely along a level surface without friction.
The vertical component of a projectile's velocity is like the motion for a freely falling object.
Describe the components of projectile motion
Is the speed constant? or does it change?
Is the direction constant? or does it change?
What kind of force acted on the ball?
Projectile motion involves a change in direction and speed.
For example
Which coin hits the ground first?
1. place a coin at the edge of a table so that it hangs over slightly. Place a second coin on the table some distance from the first coin
2. Slide the second coin so it hits the first one and both coins fall to the floor below. Which coin hits the ground first?
3. Think does your answer depend on the speed of the coin? explain.
Talk about other example of projectile motion.
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