Concept explainers
A 100 g ball on a 60-cm-long string is swung in a vertical circle about a point 200 cm above the floor. The tension in the string when the ball is at the very bottom of the circle is 5.0 N. A very sharp knife is suddenly inserted, as shown in FIGURE P8.56, to cut the string directly below the point of support. How far to the right of where the string was cut does the ball hit the floor?
Trending nowThis is a popular solution!
Learn your wayIncludes step-by-step video
Chapter 8 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Additional Science Textbook Solutions
The Cosmic Perspective
Tutorials in Introductory Physics
Conceptual Physics (12th Edition)
Physics for Scientists and Engineers with Modern Physics
Introduction to Electrodynamics
College Physics: A Strategic Approach (3rd Edition)
- You are swinging a 0.45 kg water balloon vertically. The distance from your shoulder (acting as the center of rotation) and the water balloon is about 0.70 m. You estimate the water balloon is traveling at 6.0 m/s. At the very bottom of the circular path, how much force is your hand holding the water balloon?arrow_forwardA car is accelerating from rest. There is a 1.6 g pebble stuck in the tread of one of the tires 0.38 m from the center of rotation. The pebble is held in place with static friction which has a maximum value of 3.6 N. What speed does the car reach when the pebble pulls out of the tread? Use Newton's 2nd Law and centripetal acceleration to solve this. Think about the relationship between the translational speed of the car and the tangent speed of the pebble.arrow_forwardA car initially traveling eastward turns north by traveling in a circular path at uniform speed as shown in Figure P7.15. The length of the arc ABC is 235 m, and the car completes the turn in 36.0 s. (a) Determine the car’s speed. (b) What is the magnitude and direction of the acceleration when the car is at point B?arrow_forward
- Sylvia and Jadon now want to work a problem. Imagine a puck of mass 0.5 kg moving as in the simulation. Suppose that the tension in the string is 4.0 N, and that the radius of its circular path is 0.7 m. What will Jadon and Sylvia find for the tangential speed of the puck?arrow_forwardChad gets on a roller coaster. Chad and the cart rolls down the frictionless loop with a constant speed of 7.4 m/s. The mass of Chad and the cart is 0.75 kg and the radius of the loop is 0.86 m. Since the cart has a smaller dimension than the loop, the cart can be viewed as a point particle. What is the normal force at the top and bottom points? The magnitude of the gravitational acceleration is 9.8 m/s^2. Draw a free body diagram.arrow_forwardA unicorn is standing on a rotating platform, so that it can be admired from every angle. The platform is 5 m in radius and rotates every 8 seconds (otherwise known as 1/8 of a rotation per second). A. What velocity will the unicorn have if it is on the edge of the platform? B. What coefficient of friction must the unicorn's hooves have to keep him from slipping over the edge?arrow_forward
- A model airplane of mass 0.750 kg flies with a speed of 35.0 m/s in a horizontal circle at the end of a 60.0-m con- trol wire as shown in Figure P7.60a. The forces exerted on the airplane are shown in Figure P7.60b; the tension in the control wire, 0 = 20.0° inward from the vertical. Compute the tension in the wire, assuming the wire makes a constant angle of 0 = 20.0° with the horizontal. Circular path of airplane lift Wire | mg Б Figure P7.60arrow_forwardAn object moving in a circular trajectory experiences both centripetal and tangential accelerations. Can the two accelerations ever cancel each other out? a No. b You're kidding, right? c Yes. d Only if the plane of the trajectory makes an angle with the vertical.arrow_forwardSuppose you swing a ball of mass m in a vertical circle on a string of length L. As you probably know from experience, there is a minimum angular velocity wmin you must maintain if you want the ball to complete the full circle without the string going slack at the top. A. Find the expression for wmin B. Evaluate wmin in rpm for a 65 g ball tied to a 1.0m long string.arrow_forward
- A string under tension of 50.0 N is used to whirl a rock in a horizontal circle of radius 2.5 m at a speed of 20.4 m/s on a frictionless table. The string passes through a small hole in the table at the center of this circle. As the string is pulled in, the speed of the rock increases. When the string is 1.00 m long and the speed is 51.0 m/s, the string breaks. What is the breaking strength, in Newtons, of the string?arrow_forwardA 2.0 x 103 kg roller coaster car travels around a 24 m radius vertical loop. The tangential speed of roller coaster car is 18 m/s at the lowest point of the loop. Determine the normal force exerted on the roller coaster car by the track at this point.arrow_forwardA 70 kg person is sitting on a bathroom scale while riding on a Ferris Wheel. The Ferris Wheel has a radius of 9 m. The scale reads 900 N when the person is at the bottom of the motion. Find the person's speed.arrow_forward
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice UniversityPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College