Question

a bullet hits a wall with a velocity of 20 metre per second and penetrates it up to a distance of 5 cm find the retardation of the bullet in the wall​

Answer 1

Answer:

40

Explanation:

v=0, u=20 , s=5,

v^2= u^2+ 2as

0=400+10a

a=-40

Answer 2

Explanation:

u=20m/s

v=0

s=5cm =0.05m

v2=u2- 2as

400= 0- 2x5/100xa

400= 1/10xa

400 X 10=a

- 4000 m/s2=a