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OpenStudy (anonymous):
a 3 kg book falls off a shelf. if it lands with a speed of 4.0 m/s from what height did it fall? A. 0.6 B. 0.8 C. 1.4 D. 2.8
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OpenStudy (anonymous):
@lupita1995
OpenStudy (anonymous):
@myininaya
OpenStudy (anonymous):
...
OpenStudy (anonymous):
Before book begins to fall, it has potential energy E=m*g*h. When the book hits the ground, all that energy has transformed into kinetic energy E=0.5*v^2
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