# Speed of a Potted Plant

## Homework Statement

[PLAIN]http://img8.imageshack.us/img8/664/photo4dc.jpg [Broken]
Sorry it is sideways.

Only known data is the 6m drop from the 12m high ledge.

## Homework Equations

Currently wokring with Kinetic enery (1/2mv^2), potential energy(mgh).

## The Attempt at a Solution

My thinking is mass doesnt matter, it will cancel out due to the mechanical energy( if that makes sense). Therefore the equation to solve is v2f=2gh

Therefore after subbing in 9.81m/ss for g, 6m for h; my final answer is 11m/s with rounding because of sig figs.

Thank you for help

Last edited by a moderator:

phinds
Gold Member
Uh, do you think you could make that figure a little bigger ... I mean, I can almost see 25% of it at a time as it is.

I also got 11m/s, but found that answer in a less complicated way:

You know:
velocity_initial is 0m/s
Distance is 6m
Acceleration is 9.8m/ss

So:
velocity_final= SQRT(2*A*D)
V_F= SQRT(2*9.8*6)
V_F= 10.844m/s