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
PHY F/SCIENTIST MOD MASTERING 24 MO
Additional Science Textbook Solutions
Human Anatomy & Physiology (2nd Edition)
Applications and Investigations in Earth Science (9th Edition)
Human Biology: Concepts and Current Issues (8th Edition)
Chemistry: A Molecular Approach (4th Edition)
Biology: Life on Earth (11th Edition)
Introductory Chemistry (6th Edition)
- A 90 g bead 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 bead is at the very bottom of the circle is 2.2 N. A very sharp knife is suddenly inserted, as shown in the figure, to cut the string directly below the point of support. How far to the right of the center of the circle does the ball hit the floor? ... 60 cm Knife 200 cm А) 200 cm в) 240 сm 190 cm D) 160 cmarrow_forwardA bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel and observes that drops of water fly off tangentially. She measures the heights reached by drops mov- ing vertically (Fig. P7.8). A drop that breaks loose from the tire on one turn rises vertically 54.0 cm above the tangent point. A drop that breaks loose on the next turn Figure P7.8 rises 51.0 cm above the tangent point. The radius of the wheel is 0.381 m. (a) Why does the first drop rise higher than the second drop? (b) Neglecting air friction and using only the observed heights and the radius of the wheel, find the wheel's angular acceleration (assuming it to be constant). Problems 8 and 69.arrow_forwardA typical road bike wheel has a diameter of 70 cm including the tire. In a time trial, when a cyclist is racing along at 12 m/s:a. How fast is a point at the top of the tire moving?b. How fast, in rpm, are the wheels spinning?arrow_forward
- A 4.0-kg object is attached to a vertical rod by two strings as shown in Figure P7.69. The object rotates in a horizontal circle at constant speed 6.00 m/s. Find the tension in (a) the upper string and (b) the lower string.arrow_forwardYou 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 5 kg hoop (I=MR2) with a radius of 2 m is placed at the top of a hill that is 8 m high. There is just enough friction of the hoop to roll when it is released from rest. What is the hoop's translational (traveling) speed at the bottom of the hill? Please use 10 m/s2 for the magnitude of the acceleration due to gravity.arrow_forward
- Merry-go-rounds are a common ride in park playgrounds. The ride is a horizontal disk that rotates about a vertical axis at their center. A rider sits at the outer edge of the disk and holds onto a metal bar while someone pushes on the ride to make it rotate. Suppose that a typical time for one rotation is 6.0 ss and the diameter of the ride is 16 ftft . 1. For this typical time, what is the speed of the rider, in m/sm/s? Express your answer in meters per second. 2. What is the rider’s radial acceleration, in m/s2m/s2? Express your answer in meters per second squared. 3. What is the rider’s radial acceleration if the time for one rotation is halved? Express your answer in meters per second squared.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 light, rigid rod is 68.5 cm long. Its top end is pivoted on a frictionless horizontal axle. The rod hangs straight down at rest with a small, massive ball attached to its bottom end. You strike the ball, suddenly giving it a horizontal velocity so that it swings around in a full circle. What minimum speed at the bottom is required to make the ball go over the top of the circle?arrow_forward
- A 2 kg rock is swung in a circular path and in a vertical plane on a 4 m length string. At the top of the path, the angular velocity is 5 rad/s. What is the tension in the string at that point?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_forwardDavid is getting ready to take down the mighty Goliath. David ties a 583 g rock to a rope that is 2.30 m in length. If David starts to swing the rope in a horizontal circle and is tilted down at a 5.94° angle, what is angular speed of the rock?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