Sample Launch
help with projectile motion?
I really dont get projectile motion, here is a sample problem, can u guys help me (seriously)
An airplane is diving at a speed of 83.3 m/s, and the angle between the plane's dive path and the vertical is 50 degrees. the plane launches a rocket which lands at 750m horizontally from beneath the launch point. (a) find the flight time of teh rocket (b) how high was the release point?
PLEASE HELP ME! I'M REALLY STUCK!
This is all the info i was given, in my other problem
Start off by drawing a right triangle. The hypotenuse of the triangle is the plane's/rocket's flight path straight into the ground (we'll assume the pilot pulls up after launching his rocket, of course). The angle is 50 degrees between the flight path and the vertical, so the remaining 40 degrees is the internal angle of the triangle representing the rocket's angle with the ground. In a right triangle, sine of the angle equals the ratio between the opposite side (the altitude of launch) and the hypoteneuse, and cosine of the angle equals the ratio between the adjacent side (the ground) and the hypoteneuse. Since you have a speed of 83.3 m/s, you can figure out the vertical and horizontal components of the plane's speed (falling at 53.54 m/s while travelling forward at 63.8 m/s, respectively). Assuming the rocket followed the exact path the plane would have taken if it crashed into the ground and that it travelled at the same speed of 83.3 m/s, you can use this to figure out what the rocket did -- you know it travelled 750 meters along the horizontal, so divide that by 63.8 m/s and you get 9 seconds of flight time. You know that if the plane had continued on it's course, therefore, it would have hit the ground in 9 seconds, so it took 9 seconds at 53.54 m/s to go from launch altitude to reach the ground, which means it started at 482 m.
Doshin the Giant 1 Sample NFS Launch and Gameplay 64DD Demo
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