Question

When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. This pressure causes the force that pushes the bullet through the barrel. Suppose the barrel has a length of 0.681 m and an opening whose radius is 2.61 x 10^-3 m. A bullet (mass = 2.6 x 10^-3 kg) has a speed of 356 m/s after passing through this barrel. Ignore friction and determine the average pressure of the expanding gas.

Answer 1

change in kinetic energy of bullet - Aka hmn2 = 2x2.6 x 15 x (350)²5 - 164.76 J And work done by gas his pov According to work energy threasema - W='ak. pave AK pek , Ava Adla -681x17x(2-61X103) = 14.57x106m3. AV ? P= 164.7G J'. 14.57 m3 = 11-31x10. Pa.