What Angle Is the Road Banked for a 1000kg Car on a 25m Radius Track at 30m/s?

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SUMMARY

The discussion focuses on calculating the banking angle of a road for a 1000kg car traveling at 30m/s on a frictionless track with a radius of 25m. The key equation used is the centripetal force equation, Fc = mv²/r, which relates the mass, velocity, and radius of the turn. To find the angle θ, participants suggest using a free body diagram to analyze the forces acting on the car, specifically the gravitational force and the normal force components. The angle can be determined by setting the component of the weight that points towards the center of the path equal to the required centripetal force.

PREREQUISITES
  • Understanding of centripetal force (Fc = mv²/r)
  • Knowledge of free body diagrams
  • Basic trigonometry for resolving forces
  • Familiarity with gravitational force calculations
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  • Study how to draw and analyze free body diagrams in physics
  • Learn about the relationship between banking angles and centripetal motion
  • Explore the effects of friction on banking angles in real-world scenarios
  • Investigate the derivation of the banking angle formula for circular motion
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Homework Statement


a 1000kg car negotiates a banked friction free track or radius 25m with speed 30m/s

to what angle to the horizontal is the road banked?


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The Attempt at a Solution


tried to calculate the normal force of the car, to find the angle between the weight vector and the normal force vector, which would be equal to the angle that the road is banked.
However, I could not find the angle fo the normal force
 
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If the angle of baking is θ, what is the component of the weight that points towards the center of the path?
 
mgsin theta, you don't know theta though..
 
superaznnerd said:
mgsin theta, you don't know theta though..

A free body diagram will allow you to use trigonometry to find theta.
 
superaznnerd said:
mgsin theta, you don't know theta though..

if that force provides the centripetal force, you can find θ.

Fc=mv2/r remember?
 

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