Question

A bullet hits a wall with a velocity of 20m/s and penetrates it to a distance of 5 cm. find the deceleration of bullet in the wall.

Answer 1

We have,
Initial velocity, u = 20 m/s 

Distance travelled, s = 5cm=0.05 m
 
Let the retardation produced be ‘a’. 
The final velocity is v = 0. 

So,
 v² = u² +2as 

=> 0 = 20² +2a(0.05) 

=> a = -4000 m/s ²

Thus the retardation/deceleration produced is 4000 m/s ²

Answer 2

◆Ekansh Nimbalkar◆
hello friend here is your required answer