Can a Car Safely Turn on a 40-Degree Banked Road at 30 m/s?

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SUMMARY

A car can safely turn on a road banked at 40 degrees while traveling at 30 m/s, given a coefficient of friction (u) of 0.6 and a turn radius of 100 meters. The forces acting on the car, including gravitational force and friction, must be analyzed through a force diagram to ensure that the downward force of gravity, combined with the frictional force, is adequate to prevent slipping. The centripetal acceleration must also be accounted for in the calculations to confirm safety during the turn.

PREREQUISITES
  • Understanding of centripetal acceleration
  • Knowledge of force diagrams and vector resolution
  • Familiarity with friction coefficients
  • Basic principles of physics related to motion on inclined planes
NEXT STEPS
  • Study the principles of centripetal force in circular motion
  • Learn how to draw and interpret force diagrams
  • Explore the effects of different friction coefficients on vehicle dynamics
  • Investigate the physics of motion on inclined planes and banking angles
USEFUL FOR

Physics students, automotive engineers, and anyone interested in understanding vehicle dynamics and safety on banked roads.

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Homework Statement



Will a road banked at 40 degrees allow cars (u=0.6) to safely make a turn (radius=100m) while traveling at 30 m/s (or 67 mi/hr)?

Homework Equations



f = uN
possibly others

The Attempt at a Solution



I'm really not sure how to get started. This is the only problem I don't know how to do. I would really appreciate any help. Thank you.
 
Last edited:
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Welcome to PF.

Draw a force diagram on the car.

Gravity is vertically down, so the components of weight can be resolved as vectors along the incline and normal to the incline.

The centripetal acceleration is acting horizontally. Its components can also be resolved along the plane of the incline and normal to it.

If the downward force of gravity and the additional maximum contribution from the friction component is sufficient to prevent the car from slipping then ...
 

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