7. A catapult is used by the armies of Mordor to hurl stones at the walls of Minas Tirith. The catapult can launch a 50 kg stone at a speed of 60 m/s. The arm of the catapult is 4 m long and has a mass of 100 kg. For simplicity, assume the hinge of the catapult arm is a ground level; the arm is brought all the way down (horizontal); and launches the stone at an angle of 30° from horizontal. A. Assuming it was constant, what was the angular acceleration of the stone during the launch? B. What was the net torque on the catapult arm during the launch?

7. A catapult is used by the armies of Mordor to hurl stones at the walls of Minas Tirith. The catapult can launch a 50 kg stone at a speed of 60 m/s. The arm of the catapult is 4 m long and has a mass of 100 kg. For simplicity, assume the hinge of the catapult arm is a ground level; the arm is brought all the way down (horizontal); and launches the stone at an angle of 30° from horizontal. A. Assuming it was constant, what was the angular acceleration of the stone during the launch? B. What was the net torque on the catapult arm during the launch?