A bullet is fired in to s wall losses half of its velocity after penetrsting 3m.how much further will it penetrate.
energy (kinetic) is proportional to the square of the velocity
if the remaining velocity is a half, then the remaining energy is a quarter ... (1/2)^2 = 1/4
the bullet used 3/4 of its energy to penetrate 3 m
it will go another meter