# Homework Help: Help me .

1. Sep 30, 2007

### stunning

plzzzzzzzzz help me .........

in what circumstances is the x-component of a vector given by magnitude of a vector times the sine of its direction angle?

2. Sep 30, 2007

### Staff: Mentor

When the angle given is with respect to the vertical (y-axis).

3. Sep 30, 2007

### stunning

oh thank u so much...............

4. Sep 30, 2007

### stunning

can ny 1 help me with these questions???
If the component of vector A along the direction of vector B is zero, what can u about the two vectors?

5. Sep 30, 2007

### stunning

Q:2
If the average velocity of an abject is zero in some time interval, what can u say about the displacement of the object for that interval?

6. Sep 30, 2007

### Staff: Mentor

Well, what do you think?

7. Sep 30, 2007

### stunning

i hv no idea

8. Sep 30, 2007

### Sourabh N

what do you mean by component of vector A along the direction of vector B?

9. Sep 30, 2007

### malawi_glenn

of course you must have some clue or idea.

can you draw two vectors that have no common component? What can you say about them? hint: look at angles.

Q2: What is the definition of velocity (speed and velocity is not the same), and average velocity?