How Do You Calculate the Force of Friction for a Moving Car?

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SUMMARY

The force of friction for a moving car can be calculated using Newton's First Law, which states that if an object is moving at a constant velocity, the net force acting on it is zero. In the case of a 2000 kg car traveling at 30 m/s with a forward motor force of 4000 N, the force of friction must also be 4000 N to maintain this constant velocity. Therefore, the force of friction directly opposes the applied force, resulting in a net force of zero.

PREREQUISITES
  • Understanding of Newton's Laws of Motion
  • Basic knowledge of force and friction concepts
  • Familiarity with free body diagrams
  • Concept of net force in physics
NEXT STEPS
  • Study Newton's First Law of Motion in detail
  • Learn about the coefficient of friction and its calculation
  • Explore free body diagram techniques for analyzing forces
  • Investigate the effects of different surfaces on frictional force
USEFUL FOR

Students studying physics, automotive engineers, and anyone interested in understanding the dynamics of moving vehicles and the forces acting on them.

Koyuki
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This is probably horribly easy, but it's almost 1 AM so I'm going nutty trying to figure this one out.

The questoni: "A 2000kg car is traveling at a constant 30m/s with the motor producing a force of 4000 N forward. Find the force of friction."

I drew the diagram. Is acceleration 0?

I'd appreciate any help. Thank you~
 
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There is a force forward of 4000N that is being completely negated by friction, since it is moving at constant velocity.. If the net force is 0, what is the force of friction?
 

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