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

A 245 kg motorcyle & rider can produce an acceleration of 3.50 m/s sq while travelling at 25 m/s. At that speed, the forces resisting motion (friction & air) total 400 N. What force does the motorcycle exert backward to produce it's acceleration?

2. Relevant equations

Force = mass x acceleration + Friction motion

3. The attempt at a solution

Fnet = (m x a) + Ffr

= (245 x 3.5) + 400N

= 1257.5N

This needs a 2nd look. I'm not sure if the speed matters since we have mass and acceleration values. Please take a look, I'll stand by.

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

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: Newtons Law - backward motion

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