Q. A toy train rolls around a horizontal 2 diameter track. The coefficient of rolling friction is 0.15. What is the magnitude of the train's angular acceleration after it is released?
Q. A 26 kg gun is standing on a frictionless surface. The gun fires a .0573 kg bullet with a muzzle velocity of 323 m/s. The positive direction is that of the bullet immediately after the gun was fired. Calculate the momentum of the gun immedately after the gun was fired.