Question
A bullet is moving with velocity u after emerging from a plank
its velocity reduces by u/20 then find the total number of planks required to stop this bullet?
its velocity reduces by u/20 then find the total number of planks required to stop this bullet?
Answers
Scott
u - u/20 = 19u/20 = .95u
.95² = .9025
the bullet loses about 10% of its energy (kinetic), as work passing through the plank
it should stop in the 11th plank
.95² = .9025
the bullet loses about 10% of its energy (kinetic), as work passing through the plank
it should stop in the 11th plank