Centripetal Force. Centripetal Force. Inwardly directed force which causes a body to turn; perpendicular to velocity Centripetal force always arises from other forces , and is not a unique kind of force Sources include gravity, friction, tension, electromagnetic, normal Σ F = ma
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rExample: Highway Curves
Friction turns the vehicle
Normal force turns the vehicle
A 1500 kg car is navigating a curve on a flat road. The radius of the curve is 35.0 m and the coefficient of static friction b/w the tires and the road is .500. Find the maximum speed of the car so it can still make the curve without sliding off the road.
What provides the centripetal force for a conical pendulum?
PHUN PHYSICS QUIZ:Derive an expression for the velocity of a conical pendulum with respect to the string length and angle θ.
An engineer is designing a rounded exit ramp for a highway. The ramp is to be made so that a car wouldn’t have to rely on friction to round the curve without skidding (like when it’s icy). To do this the ramp must be banked, or tilted toward the center of the curve. The radius of the curve is 50.0 m and the speed limit on the ramp is 13.4 m/s (30 mph).
At what angle should the ramp be banked?