If the velocity of an object is reduced by half, its kinetic energy will be which of the following?
a. Reduced to one eighth c. Reduced twofold
b. Increased twofold d. Not changed
ANS: A
Kinetic energy = (mass of object ? square of velocity it is traveling, or mv2) or KE = (V ? V). If the velocity is reduced by half, then KE = (V ? V), or () = reduction.
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