Question

a bullet moving with a velocity of 10 ms-1 is bought to rest after panetrating a wooden plank of 4cm thickness . the retardation of the bullet is ​

Answer 1

Answer:

S = 4×10-2 m

u = 10 ms-1

v = 0

We have

v2 = u2+2as

=> (10)2+2a(4×10-2) = 0

=>2a(4×10-2) = -100

=>a = -1250 ms-2

-ve sign means the bullet suffers retardation