Associated Topics || Dr. Math Home || Search Dr. Math

### Speed down a Hill

```
Date: 4/17/96 at 10:43:27
From: Spring Lake Park H.S.
Subject: physics

How fast is an object going at the bottom of a 14.9m hill,
if it starts at the top going 3.0 m/s?
```

```
Date: 4/18/96 at 19:32:8
From: Doctor Ken
Subject: Re: physics

Hello!

In order to do this problem, you have to assume a few things:

- you have to assume that friction isn't going to be much of a
factor

- similarly, wind resistance isn't going to play a big part.

Also, here's a tip: Since they didn't say how steep the hill was,
it probably doesn't make any difference, right?  So you might as
well use the easiest hill you know of, namely the hill that goes
straight down (no hill at all).  Does that make the problem easier
for you?  Remember, the downward acceleration due to gravity of
any object on the Earth's surface is about 9.8 meters per second.

Write back if you still need more help on this.

-Doctor Ken,  The Math Forum

```
Associated Topics:
High School Physics/Chemistry

Search the Dr. Math Library:

 Find items containing (put spaces between keywords):   Click only once for faster results: [ Choose "whole words" when searching for a word like age.] all keywords, in any order at least one, that exact phrase parts of words whole words

Submit your own question to Dr. Math
Math Forum Home || Math Library || Quick Reference || Math Forum Search