a bullet fired into a fixed target loses half of its velocity in penetrating 15cm.how much further will it penetrate before coming to rest?

Question

options:
1.5cm
2.15cm

Answer 1

3/4 of the initial kinetic energy is used up going the first 15 cm. There is enoough left to penetrate 1/3 as far (5 cm). This assumes that the force resisting penetration is constant.

Answer 2

15

Answer 3

i think it should be 1/3rd if 15 i.e. cm but not sure...
i also don't know correctly but if anyone knows please let me know....

Answer 4

5cm

Answer 5

5 cm..Use v^2-u^2=2as...Hope u will get the answer...or do it by using the method of
conservation of energy