1. The problem statement, all variables and given/known data A 15 g bullet is fired into a 2.55 kg block that is hanging by a 2.0 m long string. The speed of the bullet is 425 m/s. Calculate the angle when the system reaches its maximum height? 2. Relevant equations m1v1=(m1+m2)vf (1/2)mv^2=mgh 3. The attempt at a solution (0.015 kg)(425 m/s) = (0.015 kg + 2.55 kg)vf vf=2.49 m/s (.5)(2.565 kg)(2.49 m/s)^2=(2.565)(9.8)h h=.316 m Now that I have my height, I am not sure what to do. I think it should be a simple trig function at this point, but I cannot get the correct answer which is 32.6 degrees. I've also tried using L-Lcosθ=h, but have not had luck with that. Thanks in advance.