Concept explainers
A pail of water is rotated in a vertical circle of radius 1.00 m. (a) What two external forces act on the water in the pail? (b) Which of the two forces is most important in causing the water to move in a circle? (c) What is the pail’s minimum speed at the top of the circle if no water is to spill out? (d) If the pail with the speed found in part (c) were to suddenly disappear at the top of the circle, describe the subsequent motion of the water. Would it differ from the motion of a projectile?
Trending nowThis is a popular solution!
Chapter 7 Solutions
Bundle: College Physics, Loose-Leaf Version, 10th, + WebAssign Printed Access Card for Serway/Vuille's College Physics, 10th Edition, Multi-Term
Additional Science Textbook Solutions
Glencoe Physics: Principles and Problems, Student Edition
Physics for Scientists and Engineers, Technology Update (No access codes included)
Fundamentals Of Physics - Volume 1 Only
An Introduction to Thermal Physics
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Introduction To Health Physics
- A space station, in the form of a wheel 120 m in diameter, rotates to provide an artificial gravity of 3.00 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the wheels rotation in revolutions per minute that will produce this effect.arrow_forwardThe accompanying figure shows a frictionless channel in the shape of a segment of a circle with center at "O". The channel has been anchored to a frictionless horizontal tabletop. You are looking down at the table. Forces exerted by the air are negligible. A ball is shot at high speed into the channel at "p" and exits at "r." Consider the following distinct forces: A downward force of gravity. A force exerted by the channel pointing from q to O. A force in the direction of motion. A force pointing from O to q. Which of the above forces is (are) acting on the ball when it is within the frictionless channel at position "q"?arrow_forwardSuppose you wish to whirl a pail full of water in a vertical circle at a constant speed without spilling any of its contents (even at the top of the circle!). If your arm is 0.65 m long (from shoulder to fist) and the distance from the handle to the surface of the water is 17 cm, what minimum speed is required?arrow_forward
- In a grand prix race of mass m= 600 kg as it travels on a fast track on a circular arc of radius r = 100 m because of the shape of the car and the wings on it. The passing air exerts a negative lift FL downward on the car. If the coefficient of static friction between the tire and the track is 0.75 and if the car is on the verge of sliding out of the turn when its speed is 28.6 m/s, what is the magnitude of the negative lift acting downward on the car?arrow_forwardWhat 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?arrow_forwardA ball on a string is spun in a circle over someone's head. If the ball has a mass of 0.75 kg, spins at a steady speed of 3.0 m/s, and sweeps out a circle with a radius of 0.50 m, what will be the force the person's hand must exert on the string to bend the ball's path into a circle?arrow_forward
- A bucket of mass 2.00 kg is whirled in a vertical circle of radius 1.10 m. At the lowest point of its motion the tension in the rope supporting the bucket is 25.0 N.(a) Find the speed of the bucket.(b) How fast must the bucket move at the top of the circle so that the rope does not go slack?arrow_forwardA 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_forwardAn airplane is flying in a horizontal circle at a speed of 460 km/h. If the wings of the plane are tilted 26° to the horizontal, what is the radius of the circle (in m) in which the plane is flying? (See the figure.) Assume that the required force is provided entirely by an "aerodynamic lift" that is perpendicular to the wing surface.arrow_forward
- An automobile moves on a level horizontal road in a circle of radius 30 m. (i.e. the road is flat, not banked) The coefficient of friction between tires and road is 0.50. The maximum speed with which this car can round this curve, and the direction of the frictional force is: (note: you may use g = 10 m/s/s) 10 m/s; radially inward 10 m/s; radially outward 12 m/s; radially inward 12 m/s; radially outward 14 m/s; radially inward 14 m/s; radially outward Not enough information is given.arrow_forwardA vehicle drives around a flat circular corner with a radius of 105m. If the maximum coefficient of static friction between the wheels and pavement is 0.90, then what is the maximum speed that the car can maintain without skidding?arrow_forwardYour answer is partially correct. A circular curve of highway is designed for traffic moving at 75 km/h. Assume the traffic consists of cars without negative lift. (a) If the radius of the curve is 260 m, what is the correct angle of banking of the road? (b) If the curve were not banked, what would be the minimum coefficient of friction between tires and road that would keep traffic from skidding out of the turn when traveling at 75 km/h? (a) Number 9.667 Units ° (degrees) (b) Number 0.1703 Units ° (degrees)arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningClassical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning