Answer Happy

7. A "ballistic pendulum" is often used to calculate the velocity of a projectile. The diagram provided shows the three stages of the pendulum. In (a) the projectile is just about to hit the pendulum bob. In (b) the projectile has hit and lodged inside the pendulum bob and in (c) the collision has forced the pendulum bob to swing to its maximum height. If the projectile in the diagram has a mass of m = 0.255 kg and the pendulum bob has a mass of M=1.50 kg, calculate the initial speed of the projectile v if the bob rises to a height of h = 1.32 m. Assume an inelastic collision. b) [8] v=0) M+m M