Question

Geometry Question

Answer 1

What are the <i, j, k> components of the velocity?

Answer 2

its moving towards point B, so it has velocity in all three directions

Answer 3

Tip: If the velocity was 6, the components would have been <2, -4, -4>

Answer 4

take a plan view you have an angle with the Z direction of angle whose
sin (4/5.5) =46.64 deg so vel in this dir. 5.5 *cos 46.64 =3.77m/sec^2
that's my best shot the other dir. ditto

Answer 5

I would first get a "direction vector"
if it's moving from point A to point B, figure out v= B-A
then normalize to make it unit length
the velocity along each direction would be 5.5 vx, 5.5vy , 5.5 vz

Answer 6

rB=<0, -4, 0>........rA=<-2, -3, 4>
rB/A=<2, -1, -4>

Answer 7

can I do something with that position vector?

Answer 8

I think B is at <0 , -7, 0>

Answer 9

yea your right so its <2,-4,-4>

Answer 10

now make that unit length

Answer 11

so rBA/||rBA||? I don't exactly remember

Answer 12

yes. first, factor out any common numbers
<1, -2, -2> is still pointing the same direction as <2, -4, -4>
but shorter (smaller numbers)
now find magnitude squared vT * v

Answer 13

so (1/3)*<1, -2, -2>
now I just gotta multiply it by the velocity to get the components. Thanks

Answer 14

yes