COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 32QAP
To determine
The minimum radius of curvature of an unbanked on-ramp for a typical freeway.
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A highway curve has 200-ft radius and is designed to accommodate vehicles at a maximum speed of 100-mphwith the coefficient of friction between the tires and the road of 0.6. Determine (a) the banking angle of theroad, (b) the minimum speed that the road can accommodate and (c) the ideal speed for this road?
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 105 m at a speed of 110 km/h
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 29 km/h and the ms between tires and track is 0.32?
Chapter 5 Solutions
COLLEGE PHYSICS
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- Railroad tracks follow a circular curve of radius 500.0 m and are banked at an angle of 5.0 . For trains of what speed are these tracks designed?arrow_forwardA 3,000-kg truck leaves a freeway on a circular exit of radius 50 m at a speed of 15 m/s. What minimum coefficient of static friction between the tires and the road is required to keep the truck on the exit ramp without sliding?arrow_forwardAn athlete in a hammer-throw event swings a 7.0 kg hammer in a horizontal circle at a constant speed of 12 m/s. The radius of the hammers path is 2.0 m. What is the magnitude of the force of tension in the string attached to the hammer?arrow_forward
- An aviator, pulling out of a dive, follows the arc of a circle and is said to have pulled 3g's in pulling out of the dive. Explain what this statement means.arrow_forwardA car of mass 1.6 kg travels at a constant speed of 72 km/h around a horizontal curvedroad with radius of curvature 190 m. What is the minimum value of µₛ between the roadand the tires that will prevent slippage?arrow_forwardA given highway turn has a 105 km/h speed limit and a radius of curvature of 1.4 km a. What banking angle in degrees will prevent cars from sliding off the road, assuming everyone travels at the speed limit and there is no friction present?arrow_forward
- A bus passenger has her laptop sitting on the flat seat beside her as the bus, travelling at 10.0 m/s, goes around a turn with a radius of 25.0 m. What minimum coefficient of static friction is necessary to keep the laptop from sliding?arrow_forwardOn a wet road, the coefficient of static friction between a car's tires and the flat road is 0.40. What is the maximum speed a car can safely navigate aturn with a 72.0 m radius of curvature?arrow_forwardA car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is 0.20. What is the maximum speed with which the car can safely negotiate the unbanked curve?arrow_forward
- A 1335 kg sports car rounds a flat curve of radius 40 m. Given that the coefficient of static friction betweeen the tires and road is 0.5, calculate what maximum speed the car can round the road without slidding.arrow_forwardA 1,300 kg car is capable of making a turn at a maximum speed of 15 m/s without spinning out. If the coefficient of friction between the car's tires and the road is 0.6, find the radius of this turn. Radius_____ m (round to the nearest whole number)arrow_forwardCalculate the smallest radius of a curve that one can safely navigate at normal highway speeds (30 [m/s]) in slightly less than ideal conditions where the coefficient of static friction between the rubber and pavement is 0.50.arrow_forward
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