In a test for a Springfield rifle, a bullet of 9.7 g hits a block of wood of 3 kg. The block of wood is held by pendulum of length 1.5 m and the angle with respect to the vertical where the velocity goes to zero is 64 degrees. What is the speed of the bullet before impact? Assume the acceleration due to gravity to be 9.8 m/s 2 . Also assume that the mass of the bullet is negligible compared to the mass of the block. Answer in units of m/s.