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

A car with a mass of 1100 kg is being pulled by a tow truck exerts a 500 N force on the car and there is a 300 N friction force acting on the car.

If the car starts at rest at time t=0, at what time has the truck moved 100 meters?

2. Relevant equations

x=v_{0}t + 1/2 at^{2}

3. The attempt at a solution

First off, I attempted to draw a free body diagram.

Down is gravity

Up is normal force

left is friction force

right is the force acting on the car and the truck

Then I proceeded to fill in the variables for the equation above ^^^^

V_{0}= 0

a = 0.20 m/s^{2}

t=??? (trying to figure this out)

x = 100

I ended up with this result: 31.62 seconds.

The teacher said it was 33 seconds.

Help would be appreciated.

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# Homework Help: Forces and Laws of Motion Problem

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