PDA

View Full Version : intercepting vectors

ally
09-24-2008, 06:12 PM
Can someone please help me with this, Its driving me crazy, It seems a failry straight forward question, I just cannot get my head around it. I've asked ona few other forums and i've gotten about 6 different ways of solving it so far. All of which have given me dfferent answers

Rower A is stationary at the point A adjacent to the river bank when he spots an object floating down the river. He estimates that the object is 50m away and heading south at a speed of 3m/s (the same speed as the current) see diagram below.

Assuming rower A can sustain a rowing speed of 4m/s

1 Draw a diagram of the velocity vectors involved if rower a is to intercept the object

2 calcuate the direction with respect to the river bank he needs to row (in degrees) in order to achieve his goal.

THis questions is part of an eight question revision pakage i've been given, i've managed to do the other 7, which all involved more work and more complex equations etc, I just can't seem to et my head around this one.

Maybe my brain has finally melted!

HELP ME!