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Physics 7 Online
OpenStudy (anonymous):

A stone of mass 0.55 kilograms is released and falls to the ground. Measurements show that the stone has a kinetic energy of 9.8 joules at the point of impact with the ground. What is the stone's velocity when it hits the ground? a) 6.3 meters/second b) 7.2 meters/second c) 8.1 meters/second d) 9.3 meters/second

OpenStudy (anonymous):

use Kinetic Energy = .5mv^2

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