Question

a bullet hits a wooden plank with a velocity of 30 metre per second and emerges out with a velocity of 10 metre per second calculate the retardation if the thickness of the plank is 0.05​

Answer 1

Explanation:

Average resistive force is= mass (m) × a

                                           =8000N

Step-by-step explanation:

Initial velocity u =300m/s

Final velocity v= 100m/s

Distance s=0.05m

Retartdation be a

2×a×s= v²- u²

2×a×0.05= 100×100  - 300×300

a= 800000

Average resistive force is= mass (m) × a

                                           =8000N

pls mark it as brain list