(adsbygoogle = window.adsbygoogle || []).push({}); Kinetic and potential energy

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

A baseball is thrown from the roof of 22.2 m-tall building with an initial velocity of magnitude 10.7 m/s and directed at an angle of 50.1 degrees above the horizontal.

A) What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance?

I found the answer to be 23.44 m/s.

B) What is the answer for part (A) if the initial velocity is at an angle of 50.1 degrees below the horizontal?

This is where I am stuck. I didn't use the angle to find part A, so I don't know what I am suppose to be doing here.

2. Relevant equations

Potential and kinetic equations.

3. The attempt at a solution

thanks!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Kinteic and potential energy

**Physics Forums | Science Articles, Homework Help, Discussion**