Question

A bullet moving With a velouty 200ms strikes a soft wooden block of thickness 0.1m and emerges out with Velocity 100 ms. find the time taken to cross the block ​

Answer 1

Answer

Given,

u=300m/s

v=200m/s

s=20cm=0.20m

m=10g=0.01kg

3rd equation of motion,

2as=v

2

−u

2

retardation, a=−125000m/s

2

The resistance force, F=ma

F=0.01×125000

F=1250N