48. A 5.0-kg body has three times the kinetic energy of an 8.0-kg body. Calculate the ratio of the speeds of these bodies.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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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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Ch.7 Problem 48
automobile moving at 100.0 km/h; (b) an 80.-kg runner
sprinting at 10. m/s; and (c) a 9.1 × 10¬31 -kg electron
moving at 2.0 × 10' m/s.
48. A 5.0-kg body has three times the kinetic energy of
an 8.0-kg body. Calculate the ratio of the speeds of these
bodies.
49. An 8.0-g bullet has a speed of 800 m/s. (a) What is its
kinetic energy? (b) What is its kinetic energy if the speed is
halved?
hs daug
Transcribed Image Text:automobile moving at 100.0 km/h; (b) an 80.-kg runner sprinting at 10. m/s; and (c) a 9.1 × 10¬31 -kg electron moving at 2.0 × 10' m/s. 48. A 5.0-kg body has three times the kinetic energy of an 8.0-kg body. Calculate the ratio of the speeds of these bodies. 49. An 8.0-g bullet has a speed of 800 m/s. (a) What is its kinetic energy? (b) What is its kinetic energy if the speed is halved? hs daug
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