The velocity of a bullet is reduced from 100 m/s to 0 m/s while travelling through a wooden block of thickness 10 cm. The retardation, assuming it to be uniform will be:
A bullet with initial velocity 150 m/s penetrates a rubber block of thickness 10 cm retarding at 30 m/s2 and then enters a wooden block that stops the bullet after a distance of 6 cm. What will be the retardation when the bullet enters the rubber block?