Question

calculate the change in kinetic energy if it's velocity reduced by one third of the initial velocity?​

Answer 1

Answer:

calculate the change in kinetic energy if it's velocity reduced by one third of the initial velocity?

Answer 2

final kinetic energy k1 = 1/2×m×v²

final kinetic energy k1 =1/2×m×(v/3)²

=1/9×1/2 mv²

change in kinetic energy=1/2mv² -(1/9)× 1/2mv²

$= \frac{1}{2} mv {}^{2} (1 - \frac{1}{9} )$

=8/9×1/2×mv²

=8/9×initial kinetic energy