A playground ride consists of a disk of mass M = 59 kg and radius R = 2.2 m mounted on a low-friction axle. A child of mass m = 18 kg runs at speed v = 2.2 m/s on a line tangential to the disk and jumps onto the outer edge of the disk. R m ANGULAR MOMENTUM (a) Consider the system consisting of the child and the disk, but not including the axle. Which of the following statements are true, from just before to just after the collision? The momentum of the system doesn't change. OThe torque exerted by the axle is zero because the force exerted by the axle is very small. O The momentum of the system changes. O The angular momentum of the system about the axle hardly changes. O The axle exerts a force on the system but nearly zero torque. O The torque exerted by the axle is nearly zero even though the force is large, because |7| is nearly zero. O The angular momentum of the system about the axle changes. (b) Relative to the axle, what was the magnitude of the angular momentum of the child before the collision? |īcl = | kgÂ-m²/s (c) Relative to the axle, what was the angular momentum of the system of child plus disk just after the collision? |Icl = kg m2/s
A playground ride consists of a disk of mass M = 59 kg and radius R = 2.2 m mounted on a low-friction axle. A child of mass m = 18 kg runs at speed v = 2.2 m/s on a line tangential to the disk and jumps onto the outer edge of the disk. R m ANGULAR MOMENTUM (a) Consider the system consisting of the child and the disk, but not including the axle. Which of the following statements are true, from just before to just after the collision? The momentum of the system doesn't change. OThe torque exerted by the axle is zero because the force exerted by the axle is very small. O The momentum of the system changes. O The angular momentum of the system about the axle hardly changes. O The axle exerts a force on the system but nearly zero torque. O The torque exerted by the axle is nearly zero even though the force is large, because |7| is nearly zero. O The angular momentum of the system about the axle changes. (b) Relative to the axle, what was the magnitude of the angular momentum of the child before the collision? |īcl = | kgÂ-m²/s (c) Relative to the axle, what was the angular momentum of the system of child plus disk just after the collision? |Icl = kg m2/s
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter8: Momentum And Collisions
Section: Chapter Questions
Problem 1OQ
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