Question

A bullet of mass 10g when fired with a velocity of 20m/s strikes a block of mass 1kg
and gets embedded into it. Find the combined velocity of bullet and block. THIS IS MY QUESTION ​

Answer 1

Answer:

tatal energy before firing=after firing

kinetic energy of bullet + kinetic energy of block

= kinetic energy of both block and bullet

[10g=0.01kg]

1/2×0.01×20² + 1/2×1×0 = 1/2×(1+0.01)×v²

=>400(0.01)=1.01v²

=>4=1v²

[1.01≈1]

=>v²=4

=>v=2m/s