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Answer on Mechanics | Relativity Question for Chi Fuerzas

Question #18303
Kinetic energy or energy in motion depends on the mass and the motion of an object. In formula, KE = 1/2mv^2. An object with 8 m/s has a kinetic energy of 168 joules. how much kinetic energy would it have if its speed were reduced to 2m/s?

a) 10.5 J
b) 21 J
c) 42 J
d) 63 J
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