# Kinematics Question - Need Help Desperately!

1. Sep 15, 2011

### Joe_K

1. The problem statement, all variables and given/known data

An unsuspecting bird is coasting along in an easterly direction at 1.34 m/s when a strong wind from the south imparts a constant acceleration of 0.200 m/s^2. If the acceleration from the wind lasts for 3.90s, find the magnitude, r, the direction, theta, of the bird's displacement during this time period. (HINT: assume the bird is originally travelling in the +x direction)

2. Relevant equations

3. The attempt at a solution

I missed a day of class, and I am not really sure what the equations are that I am supposed to use for this type of question. Can anyone help me get going on this problem? Thanks in advance.

2. Sep 15, 2011

### Staff: Mentor

The problem is much like the usual projectile kind of problem. There's an initial velocity in the x-direction and an acceleration in the y-direction. The motions are independent. Compute both over the given time interval. Treat as vector components for the total displacement.

3. Sep 15, 2011

### Joe_K

Thank you for your help, I am still a little confused as to what you mean by "compute over the given time interval"

4. Sep 15, 2011

### Staff: Mentor

What's the x-direction displacement after the stated time? What's the y-direction displacement after the given time?