(a) Without the wheels, a bicycle frame has a mass of 7.77 kg. Each of the wheels can be roughly modeled as a uniform solid disk with a mass of 0.820 kg and a radius of 0.343 m. Find the kinetic energy of the whole bicycle when it is moving forward at 4.05 m/s. (b) Before the invention of a wheel turning on an axle, ancient people moved heavy loads by placing rollers under them. (Modern people use rollers, too. Any hardware store will sell you a roller bearing for a lazy susan.) A stone block of mass 777 kg moves forward at 0.405 m/s, supported by two uniform cylindrical tree trunks, each of mass 82.0 kg and radius 0.343 m. No slipping occurs between the block and the rollers or between the rollers and the ground. Find the total kinetic energy of the moving objects.

(a) Without the wheels, a bicycle frame has a mass of 7.77 kg. Each of the wheels can be roughly modeled as a uniform solid disk with a mass of 0.820 kg and a radius of 0.343 m. Find the kinetic energy of the whole bicycle when it is moving forward at 4.05 m/s. (b) Before the invention of a wheel turning on an axle, ancient people moved heavy loads by placing rollers under them. (Modern people use rollers, too. Any hardware store will sell you a roller bearing for a lazy susan.) A stone block of mass 777 kg moves forward at 0.405 m/s, supported by two uniform cylindrical tree trunks, each of mass 82.0 kg and radius 0.343 m. No slipping occurs between the block and the rollers or between the rollers and the ground. Find the total kinetic energy of the moving objects.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

(a) Without the wheels, a bicycle frame has a mass of 7.77 kg. Each of the wheels can be roughly modeled as a uniform
solid disk with a mass of 0.820 kg and a radius of 0.343 m. Find the kinetic energy of the whole bicycle when it is moving
forward at 4.05 m/s.
(b) Before the invention of a wheel turning on an axle, ancient people moved heavy loads by placing rollers under them.
(Modern people use rollers, too. Any hardware store will sell you a roller bearing for a lazy susan.) A stone block of mass
777 kg moves forward at 0.405 m/s, supported by two uniform cylindrical tree trunks, each of mass 82.0 kg and radius
0.343 m. No slipping occurs between the block and the rollers or between the rollers and the ground. Find the total kinetic
energy of the moving objects.

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