Question

a bullet is going at 350m/s enters a concrete wall and penetrate a distance of 5cm before coming to rest.find deceleration

Answer 1

GIVEN :
u = 350 m/s
v = 0
s = 5 cm = 0.05 m
a = ?

v^2 - u^2 = 2as
0 - 122500 = 2×a×0.05
a = -122500/0.1
a = -1225000 m/s^2


as acceleration is negative ,
therefore deceleration is 1225000m/s^2


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