Here i go Again, Phy 11 Forces

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Homework Help Overview

The discussion revolves around a physics problem involving forces acting on a car, specifically focusing on calculating acceleration, final velocity, and distance traveled. The subject area is dynamics within the context of forces and motion.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to calculate acceleration using net force and mass, while also converting initial velocity from km/h to m/s. Some participants question the next steps for finding final velocity and distance, seeking clarification on the application of formulas.

Discussion Status

The discussion is active, with participants providing feedback on the original poster's calculations and encouraging further exploration of the remaining parts of the problem. There is a focus on clarifying the use of known variables to progress in the solution.

Contextual Notes

Participants are navigating through the problem with some uncertainty regarding the application of formulas and unit conversions. The original poster has provided initial calculations but has not yet resolved the subsequent questions posed in the homework statement.

john411
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Homework Statement



A 1500kg car traveling at 72km/h experiances an air reistance of 2000N and a road Friction of 1500N, if the wheels push with a force of 8000N find the Cars Acceleration, cars velocity after 35 seconds and Distance traveled in 1 minute.

Homework Equations



M= 1500kg Fa= 8000 Vi=72km/h.. that's all i figured out, Ffriction is 2000+1500??

The Attempt at a Solution


uhmmm i found out Acceleration is 3 m/s(squared) because i did (Fnet/m)=a
which was 4500/1500 =3 (8000-3500)/1500
 
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Good job finding the acceleration! Now, what have you tried for the other problems?
 
jgens said:
Good job finding the acceleration! Now, what have you tried for the other problems?

uhh
i used the formula vf=vi+at and converted the 72km/h to the units m/s
and I am stuck there
 
Well, you know the acceleration, time, and initial velocity so you should easily be able to solve for the final velocity. What's tripping you up?
 

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