A toy car has a kinetic energy of 12 J. What is its kinetic energy after a frictional force of 0.5 N has acted on it for 7 m?
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A toy car has a kinetic energy of 12 J. What is its kinetic energy after a frictional force of 0.5 N has acted on it for 7 m? J
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Answer:
The energy lost to friction force is QE = FS = .5*7 J. So ke = KE - QE = 12 - .5*7 = 8.5 J. ANS.
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