# Projectile Motion

1. Sep 21, 2006

### Stephanie

I have a problem.

Given: T=1.05s
Dx=46.1feet
Angle=15 Degrees.

I need to find Vx and Vy and Vi and Dymax.

Can anyone help me set up the problem? for each thing I need to find...

2. Sep 21, 2006

### mnx

you can find Vx using T and Dx, then you can find Vy through trigonometry, and then you'll be able to find the rest.

3. Sep 21, 2006

### Mindscrape

Put up some work, so we know what to help you with. If you just need a start, you can go with these equations:

Remember that the distance in the x direction is just the component of velocity in the x direction multiplied by the time it takes.
$$x=v_{x}t$$

$$v_{x}=v_{i}cos(\theta)$$

$$v_{y}=v_{i}sin(\theta)$$

Using those, and a basic knowledge of kinematics you should be able to find everything you need.

Last edited: Sep 21, 2006