Thank you mania,
Actually this is not a homework question, and I am not studying a physics course. I am mathematician not physician. so why did I post the question ? The answer is that i was asked to convent my sisters daughter in the solution of her teacher.
Her teacher answered the...
Homework Statement
A piece of wood mass of 10 kilograms Placed on a smooth surface.
15 bullets were fired towards the piece and stabilized in .
The mass of one bullet is 40 grams and its velocity is 1000 meters in second.
Find the velocity of the piece of wood after the 15 bullets...