Consider a moving cart of mass 120kg with a kinetic energy K. If it's velocity is doubled how much should the mass be decreased so that the KE does not change
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Answer:
The equation KE = ½ mv² shows that the relationship between Kinetic Energy and mass is directly proportional. a)So if the mass triples then the KE triples too. The relationship between Kinetic Energy and velocity is also directly proportional but with the square of the velocity. ... Hence, KE is 9 times greater.
Explanation:
it becomes quadrupled.
Because KE=1/2mv^2, if V is doubled, it is
KE(2)=1/2m(2V)^2
KE(2)=1/2m4v^2
KE(2)=2mv^2
KE(2)/KE=(1/2mv^2)/(2mv^2)=1/4
KE(2)=4KE
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