1. The problem statement, all variables and given/known data A 30g rifle bullet traveling 220 m/s buries itself in a 3.0kg pendulum hanging on a 2.1m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's maximum displacement. 2. Relevant equations p=mv K=1/2mv^2 Ug=mgy 3. The attempt at a solution First, I found the momentum of the bullet: p=mv p=(0.03kg)(200m/s) p=6.6kg*m/s Then I found the velocity of the pendulum after the bullet hits it: (6.6kg*m/s)/(3.03kg)=2.18m/s After that I found the Kinetic Energy of the system just after the bullet hits the pendulum: KE=1/2mv^2 KE=(1/2)(3.03)(2.18)^2 KE=7.19J Then, because that Kinetic Energy transfers to Gravitational Potential Energy when the pendulum has reached its max height, I set the Kinetic Energy equal to Gravitational Potential Energy. Ug=mgy 7.19J=(3.03kg)(9.80)(y) y=0.24m Using the length of the pendulum (2.1m) as the hypotenuse and (length of the pendulum - y=1.86m) as the y component, I used the Pythagorean Thereom to solve for the x component. a^2+b^2=c^2 1.86^2+b^2=2.1^2 b^2=2.1^2-1.86^2 b=0.98m So I got the x component to be 0.98m and the y component to be 1.9m, but MasteringPhysics says I'm wrong. What did I do wrong?