4.18 Projectile Motion
FIGURE 4.32
FIGURE 4.33
FIGURE 4.34
Q: How would you show the force of gravity on the cannon ball in theFigure4.34?
A: You would add a line pointing straight down from the cannon to the ground.
To get a better feel for projectile motion, try these interactive animations:
- http://phet.colorado.edu/en/simulation/projectile-motion
- http://jersey.uoregon.edu/vlab/ (Click on the applet “Cannon.”)
Summary
- Projectile motion is movement of an object in a curved path toward the ground because it has both a horizontal
force and the downward force of gravity acting on it. - Examples of objects that have projectile motion include arrows and cannon balls.
Vocabulary
- projectile motion: Motion of an object that has initial horizontal velocity but is also pulled down toward Earth