1) a 150g bullet is fired from a rifle with a barrel of length 65cm the bullet starts from rest at one end of the barrel and experiences a position dependent force due to the expanding gases given by... F(x)= 15,000+10,000x-25,000x^2 in newtons with x in meters.
a) calculate the work done on the bullet by this force over the length of the barrel.
b) assuming that this is only force doing work on the bullet ( neglect friction) find the speed of the bullet as it leaves the rifle.