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OpenStudy (anonymous):
A car has a kinetic energy of 1.9 * 103 joules. If the velocity of the car is decreased by half, what is its kinetic energy?
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OpenStudy (anonymous):
kinetic energy =(.5)*m*(v^2)
OpenStudy (anonymous):
so if before you had 1.9*10^3=(.5)m(v^2) and now you are using v/2 new kinetic energy = (.5)*m*(v/2)^2=(.5)*m*(v^2)/4
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