Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 9, Problem 41SP
A car moving at 5.0 m/s tries to round a corner in a circular arc of 8.0 m radius. The roadway is flat. How large must the coefficient of friction be between wheels and roadway if the car is not to skid?
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A skateboarder is attempting to make a circular arc of radius r = 19 m in a parking lot. The total mass of the skateboard and skateboarder is m = 98 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.66.
The maximum speed he can go without slipping is 11.09 m/s.Â
He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.11. What is the new magnitude of his radial acceleration in m/s2?
A pickup truck has a box sitting loose in its bed. The box has a mass of 2.5 kg and the coefficient of static friction between the box and the pickup bed is 0.8. The mass of the truck is 3150 kg and its tires have a coefficient of static friction with the road of 0.9.
 The truck is currently going through a roundabout with a radius of 30m. How fast can the truck go and not have the box slide on the truck bed? Please answer in m/s.
A 1000-kg car is picking up speed as it goes around a horizontal curve whose radius is 100 m. The coefficient of static friction between the tires and the road is 0.350. At what speed will the car begin to skid sideways?
Chapter 9 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 9 - 17. A wheel spins around exactly 6 times. How many...Ch. 9 - 18. Given that a disk revolves through 81.681...Ch. 9 - 19. Convert (a) 50.0 rev to radians, (b) 48π rad...Ch. 9 - 20. Express 40.0 deg/s in (a) rev/s, (b) rev/min,...Ch. 9 - 21. A 2.00-m-long steel rod, pivoted at one end,...Ch. 9 - 22. A pendulum swings through an angle of 20.0°,...Ch. 9 - 23. A pebble is stuck in the tread of a tire...Ch. 9 - 24. A sphere rotates about a fixed axis 10.0 times...Ch. 9 - 25. A flywheel turns at 480 rpm. Compute the...Ch. 9 - 26. It is desired that the outer edge of a...
Ch. 9 - 27. Through how many radians does a point fixed on...Ch. 9 - 28. A wheel 25.0 cm in radius turning at 120 rpm...Ch. 9 - 29. The angular speed of a disk decreases...Ch. 9 - 30. A car wheel 30 cm in radius is turning at a...Ch. 9 - 31. A wheel revolving at 6.00 rev/s has an angular...Ch. 9 - 32. A thin string wound on the rim of a wheel 20...Ch. 9 - 9.33 [II] A mass of 1.5 kg out in space moves in a...Ch. 9 - 34. (a) Compute the radial acceleration of a point...Ch. 9 - 35. A mass is whirling in a circle at the end of a...Ch. 9 - 36. A mass is whirling in a circle at the end of a...Ch. 9 - 37. Imagine a weightless 2.00-kg mass far out in...Ch. 9 - 38. The old Bohr model of the hydrogen atom has a...Ch. 9 - 39. With the previous problem in mind, what is the...Ch. 9 - Prob. 40SPCh. 9 - 41. A car moving at 5.0 m/s tries to round a...Ch. 9 - 42. A box rests at a point 2.0 m from the central...Ch. 9 - 43. A stone rests in a pail which is tied to a...Ch. 9 - Prob. 44SPCh. 9 - 45. Refer back to Fig. 9-6. How large must h be...Ch. 9 - 46. If, in Fig. 9-6 and in Problem 9.33, h = 2.5R,...Ch. 9 - 47. A satellite orbits the Earth at a height of...Ch. 9 - 49. The human body can safely tolerate a vertical...Ch. 9 - 50. A 60.0-kg pilot in a glider traveling at 40.0...Ch. 9 - 51. Suppose the Earth is a perfect sphere with R =...Ch. 9 - 9.52 [III] A mass m hangs at the end of a pendulum...
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- A skateboarder is attempting to make a circular arc of radius r = 14 m in a parking lot. The total mass of the skateboard and skateboarder is m = 89 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.59 . What is the maximum speed, in meters per second, he can travel through the arc without slipping?arrow_forwardA car travels at a steady 39 m/s around a horizontal curve of radius 143 m. What is the minimum coefficient of static friction between the road and the car's tires that will allow the car to travel at this speed without sliding?arrow_forwardA skateboarder is attempting to make a circular arc of radius r = 19 m in a parking lot. The total mass of the skateboard and skateboarder is m = 95 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.66 . A) What is the maximum speed, in meters per second, he can travel through the arc without slipping? B) He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.21. What is the new magnitude, in meters per squared second, of his radial acceleration?arrow_forward
- A skateboarder is attempting to make a circular arc of radius r = 16 m in a parking lot. The total mass of the skateboard and skateboarder is m = 91 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.69 . a)What is the maximum speed, in meters per second, he can travel through the arc without slipping?  b) He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.24. What is the new magnitude of his radial acceleration in m/s2?arrow_forwardQ. A large vertical cylinder spins about its axis fast enough that any person inside is held up against the wall when drops away from the floor. The coefficient of static friction between person and the wall is u, = 0.35, and the radius of cylinder r = 2m. What is the maximum (linear) speed necessary to keep person from falling? (g = 9.80) m A B C D E 7.48 m/s 5.50 m/s 3.28 m/s 9.80 m/s 11.48 m/sarrow_forwardImagine If A skateboarder is attempting to make a circular arc of radius r = 19 m in a parking lot. We know the total mass of the skateboard and skateboarder is m = 95 kg. If the coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.66 . A) Now what is the maximum speed, in meters per second, he can travel through the arc without slipping?arrow_forward
- A car travels around a circle with a diameter of 500 m at a constant speed of 25 m/s. The static friction coefficient is 0.3 and the kinetic friction coefficient is 0.2. Will the car skid?arrow_forwardA car travels at a constant speed of 15.6 m/s round a level circular bend of radius 52.3 m. What is the minimum coefficient of static friction between the tyres and the road in order for the car to go round the bend without skidding?arrow_forwardA car enters a level, unbanked semi-circular hairpin turn of 100 m radius at a speed of 28 m/s. The coefficient of friction between the tires and the road is m = 0.800. If the car maintains a constant speed of 28Â m/s, it willarrow_forward
- A car of mass 622 kg is driving around a curve with a circular arc of radius 20 m. If the car drives at a speed of 12 m/s, what is the minimum value of the coefficient of friction between the car's tires and the road that will keep the car on the road?arrow_forwardCurved portions of highways are always banked (tilted) to prevent cars from sliding off the highway.When a highway is dry, the frictional force between the tires and the road surface may be enough to prevent sliding.When the highway is wet, however, the frictional force may be negligible, and banking is then essential. a car of mass m as it moves at a constant speed v of 20 m/s around a banked circular track of radius R = 190 m. (It is a normal car, rather than a race car, which means that any vertical force from the passing air is negligible.) If the frictional force from the track is negligible, what bank angle u prevents sliding?arrow_forwardA skateboarder is attempting to make a circular arc of radius r = 11 m in a parking lot. The total mass of the skateboard and skateboarder is m = 86 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.59 . He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.21. What is the new magnitude of his radial acceleration in m/s2?arrow_forward
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