Conservation of Energy max height

[soul5]

Homework Statement

An arrow(mass=0.2kg) is fired at a 45 degree angle with an inital velocity of 15 m/s. Find it's max height and kinetic energy when it is at it's max height.

Homework Equations

Ek=1/2mv^2
Ep=mgh

The Attempt at a Solution

I tried breaking it down to x and y components, but I don't know if that's right.

 

[Tedjn]

What is the kinetic and potential energy of the arrow as it is first fired? What is the velocity of the arrow at the maximum height?

 

[silvashadow]

Max height has to do with potential energy. Kinetic energy at max height is a conceptual question and idea.

 

[soul5]

What is the kinetic and potential energy of the arrow as it is first fired? What is the velocity of the arrow at the maximum height?

that's all the info they gave me.

 

[Tedjn]

No, what I mean is that you can figure out those two things I asked you from the information you are given. Think about what forces act on the arrow. Does the horizontal velocity ever change?

 

[silvashadow]

Break the velocity into components.