# Vector Question on a car

1. Oct 20, 2010

### nosrepesJD

Vector Question plz help

1. The problem statement, all variables and given/known data
A boy in a car moving at 10km/h[N] wants to throw a ball to a girl standing on the right-hand side of the road. He is able to throw the ball at 20km/h. He wants the ball to go straight east, directly to her.
(a) Relative to the car, which way should he throw the ball in order to do this?
(b) Relative to the ground, how fast will the ball travel to reach her?

2. Relevant equations
not sure (missed class)

3. The attempt at a solution
not sure (missed class)

2. Oct 21, 2010

### brewAP2010

Re: Vector Question plz help

Im not comletely positive if this is right but, I think that they are giving you components of the balls velocity. The ball is moving 10 km/h N due to being in the car, and the boy can throw the ball 20 km/h E. From their you can set up a right triangle to find the angle that the ball will be moving relative to the car, and you can also find the hypotenuse which would be the balls total velocity. Again im not completely sure, but i hope this helps.