Question

a bullet moving with 10 cm per second hits a wooden plank the bullet is stopped when the penetrates 20 CM deep calculate the retradation of the bullet​

Answer 1

Given, u = 10 cm/s = 0.1 m/s; s = 0.2 m

Thus, we know that

$2as = {v}^{2} - {u}^{2}$

=> 0.4 a = 0 - 0.01 m/s

=> a = -0.01/0.4 m/s^2

=> a = - 1/40 ms^-2

HOPE THIS COULD HELP!!!