Question

the Kinetic the kinetic energy of a body is K if one fourth of its mass is removed and velocity is doubled its new kinetic energy is ​

Answer 1

Answer:

kinetic energy =1/2×mass×velocity

1/2×1/4m×2v

then the new kinetic energy is 1/4j

Answer 2

initial kinetic energy = k

mass = m

velocity = v

now according to question

mass = m - 1/4m

= 3/4m

velocity = 2v

k.E. = 1/2 × 3/4 m×(2v)^2

= 3/2 m v^2

= 3/2 times of initial kinetic energy

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