above the horizontal on a long flat firing range. What is the velocity of the
projectile 1.5s after firing.
* Maximum height reached by the projectile=92.6m
the total time in the air= 8.69s
the total horizontal distance covered= 539m
2.An airplane, whose air speed is 600km/h, is supposed to fly in a straight path
35.0 degree north of east. But a steady 100km/h wind is blowing from the north.
In what direction should thw plane head?
3.An automobile travelling 95km/h overtakes a 1.00-km-long train travelling in
the same direction on a track parallel to the road. If the train's speed is 75km/h,
how long does it take the car to pass it and how far will the car have traveled in
this time?What are the results if the car and train are travelling in opposite
directions?
更新1:
well,,,,i still don't know understand the first one.. can u explain more ??? by the way...your explainations are very clear in the other two
