Question

How is the kinetic energy of a moving car affected if its mass is doubled and its velocity becomes one-fourth ?

Answer 1

Hi friend
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Your answer
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KINETIC ENERGY FORMULA = 1/2 MV²

SO,
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WHEN MASS IS DOUBLED AND VELOCITY IS ONE FOURTH ,
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$kinetic \: enegy \: becomes = \\ \\ \frac{1}{2} \times 2m \times \frac{1}{4} v \\ \\ = \frac{1}{2} \times \frac{1}{2} m \times \frac{1}{4} v \\ = \frac{1}{8} ( \frac{1}{2} mv {}^{2} )$
SO, KINETIC ENERGY BECOMES ONE EIGHTH.

HOPE IT HELPS

#ARCHITECTSETHROLLINS

Answer 2

mass=2m
velocity=v/4

K.E=mv^2 /2
after substituting values
= 1/2 x 2m X v^2/16
K.E' =1/8[K.E]
therefore the kinetic energy becomes 1/8th times the Original K.E