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

A car has a mass of 1350 kg and an initial speed of 21 m s-1. Calculate the magnitude of the unbalanced force applied to the brakes that caused the car to come to a halt in 3 seconds.

2. Relevant equations

Force = mass x acceleration,

= ( 1350 kg ) x ( -7 m s-2 ),

= -9450 kg m s-2

= -9450 N

My question is this, is it ok to write the answer as a negative value of newtons, as above, because it doesn't seem right? I'm a little confused, any advice would be appreciated.

3. The attempt at a solution

**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: Unbalanced force

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