A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 30 m/s when it reaches ground level. What was its speed when its height was half that of its starting point?A. 11 m/s B. 15 m/s C. 21 m/s D. 25 m/s
A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 30 m/s when it reaches ground level. What was its speed when its height was half that of its starting point?A. 11 m/s B. 15 m/s C. 21 m/s D. 25 m/s
College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter5: Energy
Section: Chapter Questions
Problem 79AP: A ski jumper starts from rest 50.0 m above the ground on a frictionless track and flies off the...
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A roller coaster starts from rest at its highest point and then descends on its (frictionless) track. Its speed is 30 m/s when it reaches ground level. What was its speed when its height was half that of its starting point?
A. 11 m/s B. 15 m/s C. 21 m/s D. 25 m/s
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