a movie stuntwoman drops from a copter that is 30m above the ground and moving with a constant velocity whose components are 10m/s upward and 15m/s horizontal and toward the south. a) where on the ground(relative to the position of the helicopter when she drops) should the stuntwoman have placed the foam mats that break her fall? draw x-t, y-t, Vxt, and Vyt graphs of the motion.
2007-03-12 06:29:18 · 1 answers · asked by smiley25 2 in Science & Mathematics ➔ Physics
The first thing to do is calculate the time it takes the woman to hit the ground. Ignore, for the moment, the horizontal velocity. Her initial velocity is 10 m/s upward, but as soon as she leaves the helicopter she will accelerate downward at -9.8 m/s^2. So you'll have to figure out how far up she'll go before v=0, and then you'll have to calculate how long it will take her to get to that point. Then you'll calculate how long it will take her to fall from that point, where v=0, to the ground again.
Add those two times up, and then figure out how far she'll travel horizontally, given her velocity of 15 m/s.
From there, you can graph it.
2007-03-12 06:35:26 · answer #1 · answered by Brian L 7 · 0⤊ 0⤋