2. Sharp curves especially in hill roads use barriers so that speeding cars that lose control will be prevented from falling (see diagram below). The radius of curvature is 8 meters, in a sign before the curve, the maximum speed imposed is 40kph (km/hr). A. The average midsize sedan weighs about 1500kg. The coefficient of friction between rubber and concrete is 0.45 when wet and 0.60 when dry. Is the speed limit reasonable? Justify and support your answer with calculations. (Expand space for answers) B. If you will impose a traffic rule in the said area, what should be the speed limit and other reminders that you will put as a sign? (Expand space for answers)

2. Sharp curves especially in hill roads use barriers so that speeding cars that lose control will be prevented from falling (see diagram below). The radius of curvature is 8 meters, in a sign before the curve, the maximum speed imposed is 40kph (km/hr). A. The average midsize sedan weighs about 1500kg. The coefficient of friction between rubber and concrete is 0.45 when wet and 0.60 when dry. Is the speed limit reasonable? Justify and support your answer with calculations. (Expand space for answers) B. If you will impose a traffic rule in the said area, what should be the speed limit and other reminders that you will put as a sign? (Expand space for answers)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Please answer question asap and just send paper solution and find everything that is asked if you give wrong answer i will report it example 2 i just have 10 mins faster please
2. A ball is swung by a rope in a vertical circle of radius R. The tension in the rope at the bottom is 3 mg. (a) What is the speed of the ball at this instant? (b) If the rope is cut at the instant it is at the bottom of the circle, which is the distance h above the ground, what horizontal distance D will it travel before hitting the ground?
3
286
A car rounds a bend in the road that has a radius of 73 m. Rather than being banked inward (toward the centre of the curve), the road is banked outward, at an angle of 15°. The coefficient of static friction between the tires and the road is 0.76. a) Draw a FBD diagram of the car, as viewed from behind. Use a coordinate system that is horizontal/vertical (i.e., not rotated). b) Find the maximum speed that the car can go around the bend without sliding off the road.
4. Determine the maximum constant speed at which the 2.2-Mg car can travel over the crest of the hill at A without leaving the surface of the road. Neglect the size of the car in the calculation. y -y = 20 (1 ¬0 000) 100 m
B1
A car is moving in a circular road (radius of 56.8 m) with a speed of 13.1 m/s. Find the minimum static friction coefficient between the wheels of the car and the road to keep the car moving without sliding. Select one: O A. 0.459 ОВ. 0.363 OC. 0.399 O D. 0.438 O E. 0.308 Next page e O G 4) ENG 4:46 PM
q20
4. A 2000 kg car rounds a curve of radius 68 m banked at an angle of 11°. What is the magnitude of the friction force required for the car to travel at 90 km/h? N ssi f60 ssi O ssf60 sf60 ssi 60 ssf6
35. A small block slides along the inside of a frictionless vertical circular track. At the high point of the motion the block's acceleration has magnitude 2g. What is the magnitude of the block's acceleration at the low point? a) 6g ☐ b) 5g c) 4g d) 3g e) 2g (numbers 36-37) An object's position versus time graph is shown.
12. On a wet road, the coefficient of static friction between a car's tires and the flat road is 0.34. What is the maximum speed a car can safely navigate a turn with a 70.0 m radius of curvature? m/s £60 5 ssf60 f60 ssf