A skier of mass 64 kg is pulled up a slope by a motor-driven cable. How much work is required to pull him 80 meters up a 30 degree slope (assumed frictionless) at a constant speed of 3.1 meters/second? [answer is to be in joules](adsbygoogle = window.adsbygoogle || []).push({});

Ok, so the equation I am using is W = (Fcos(theta))*delta x

I tried using the values above and I've done it over and over and still came up with the same number.

W = ((3.1*64)*cos30)*80

= 13745.6

Am I missing something obvious? Thanks in advance for any helpful suggestions.

**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: Need help with a problem

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