# Kinetic, Potential, and Mechanical Energy

## Homework Statement

A .420kg ball is throw vertically upward at an intial sped o 12.1 m/s. If the initial potential energy is taken as zero find the bal's kinetic, potential, and mecanical energies a.) at its intial position b.) at 1.75m above the initial position, and c.) at its maximum height

## The Attempt at a Solution

I don't know what formula to use guys :( my brain is hurting from organic chem overload.

PeterO
Homework Helper

## Homework Statement

A .420kg ball is throw vertically upward at an intial sped o 12.1 m/s. If the initial potential energy is taken as zero find the bal's kinetic, potential, and mecanical energies a.) at its intial position b.) at 1.75m above the initial position, and c.) at its maximum height

## The Attempt at a Solution

I don't know what formula to use guys :( my brain is hurting from organic chem overload.

Expressions for Kinetic energy and Gravitational Potential energy would be a good start.
You may want to use the standard equations of motion, but KE and PE are all you really need.

Kinetc energy I use the: K=1/2mv^2 right? gravitational i use the U=mgy ?

PeterO
Homework Helper
Kinetc energy I use the: K=1/2mv^2 right? gravitational i use the U=mgy ?

Those formulae will work

ok thank you!