work=force*distance
1/2 mv^2=force*distance
A 25 g bullet is fired from a rifle with a barrel of length 65 cm. The bullet starts from rest at
one end of the barrel and experiences an average force of 1200 N due to the expanding gases as
it moves down the length of the barrel.
a) Calculate the work done on the bullet by the expanding gases over the length of the
barrel.
b) Assuming that this is the only force doing work on the bullet, use the Work-Energy
theorem to determine the speed of the bullet as it leaves the gun.
1 answer
1 answer