hi i would like to ask a few vector questions but i dont know where
to ask so is it ok if i open a new thread?
can someone explain to me how to do this questions?
1.find the distance from (3,7,-5) to the xy-plane, xz-plane, and yz-plane.
2.a rope is tied 8m apart,and when a wet shirt with mass of 0.8kg is hung at the middle of the line,the midpoint is pulled down 8cm.find the tension is each half of the rope.
3.a woman walks due west on a ship at 3mi/h. the ship is moving north at a speed of 22mi/h.find the speed and direction of woman relative to the surface of the water.
4.if r= (x,y,z), a= (a1,a2,a3) and b= (b1,b2,b3) show the vector equation (r-a).(r-b) = 0 represents a sphere,find its center n radius.
thanks in advance!