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- Thread starter wilmerena
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AKG

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Consider a 5 kg mass going at 50 m/s, thus having 6.25 kJ of kinetic energy. Now, a mass of 125 kg going 10 m/s also has 6.25 kJ of kinetic energy. However, the first object has a momentum of 250 kg*m/s, and the second has 1250 kg*m/s of momentum.wilmerena said:

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thanks so much =o) !!

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Doc Al

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Think about it. For a simple object:wilmerena said:

[tex] KE = 1/2 mv^2[/tex]

[tex] momentum = mv[/tex]

The only way an object can have zero momentum is if its speed (v) is what? Then what is its KE?

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thanks again, i think i just spaced out on that one ;oP

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