A bullet strikes a plank of thickness 5 cm with a velocity

Last updated: 6/9/2023

A bullet strikes a plank of thickness 5 cm with a velocity of 1000 m s and emerges out with a velocity of 400 m s the average retardation of the bullet is A 8 4 x 10 m s B C 60 105 m s X D 8 4 x 106 m s 60 x 105 m s