I'm fuzzy on what F actually is in the equation:(adsbygoogle = window.adsbygoogle || []).push({});

W= F d

is it only mg or the act of some force on an object

I was absent when we started this unit at school and now I'm having trouble with the rest of the unit because of my uncertainty of this equation.

Also, I'm having trouble with a specific question in my homework, I'll put down what I have, but it doesn't seem quite right.

A 1550kg car is travelling down the highway at a constant speed of 33.3m/s

a) If the car's engine is providing a power of 29, 500W how much force is it causing the ground to exert on the car?

here's my answer/work:

P=W/t = F v

F= P/v = 29500/33.3 = ~885.8N

now I'm unsure what to do from there, any help hints or suggestions would be helpful

**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: Energy - the ability to do work

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