A bullet emerges out from a wooden plank with 75% of its initial kinetic energy. The number of additional planks required to stop the bullet is

A bullet emerges out from a wooden plank with 75% of its initial kinet

1.	A bullet emerges out from a wooden plank with 75% of its initial kinetic energy. The number of additional planks required to stop the bullet is
Answer» 2 3 4 5 Answer :B