Pronunciation: /prəˈdʒɛk taɪl ˈmoʊ ʃən/ ?
is the vertical motion of an object
in a gravitational field given an initial
for projectile motion is:
represents time, a
due to gravity, v0
represents the initial
Since down is taken to be negative, acceleration due to gravity is a negative number.
|Manipulative 1: Projectile motion. Created with GeoGebra.||
Click on the points on the blue sliders in manipulative 1 and drag them to change the figure.
- Jeff is standing on top of 20 foot tower. He throws a stick down
at an initial velocity of -10 ft/s. Use -32 ft/s2
for the acceleration due to gravity. What is the equation for the vertical height
of the stick? At what time does the stick reach the ground?
|1||Identify the values of the constants.|
|2||Plug the constants into the equation. Simplify the equation.|
|3||Set the height to zero.|
|4||Apply the quadratic formula.|
|5||Since a negative solution does not make sense in this problem, the negative solution is extraneous solution. Discard the extraneous solution.|
Cite this article as:
Projectile Motion. 2009-01-10. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/p/projectilemotion.html.
2009-01-10: Initial version (McAdams, David.