(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Coasting along at 7.10 m/s, a 60.0 kg bicyclist on a 7.60 kg bicycle encounters a small hill. If the speed of the bicyclist is 6.00 m/s at the top of the hill, how much work was done on the bicyclist and her bike?

2. Relevant equations

KEf-KEi=W

.5mvi^2-.5mvf^2

kg*m^2*s^-2

m=60kg+7.60kg

v=m/s

3. The attempt at a solution

I tried finding the loss in KE and having that be the work done. I get

.5mVf^2 -.5mVi^2

.5*67.6kg*36 - .5*67.6kg*50.41

I get -487 J and it tells me this is the wrong answer? What did I do wrong?

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

Dismiss Notice

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: Bicycle coasting up a Hill

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