Need good answers to this Angular momentum and collisions problems so that i can compare my solutions to yours.

A weight of 4.00 kg is dropped from a height of 11.0 m and hits the end of a uniform bar which can rotate around an axis through its center (no friction). The weight sticks at the bar after the collision. The bar has a mass of 7.00 kg and is 5.50 m long. At the other end of the bar sits a ball of 3.00 kg but not attached to the bar. How high will the ball go after the collision?

Question

Need good answers to this Angular momentum and collisions problems so that i can compare my solutions to yours.

A weight of 4.00 kg is dropped from a height of 11.0 m and hits the end of a uniform bar which can rotate around an axis through its center (no friction). The weight sticks at the bar after the collision. The bar has a mass of 7.00 kg and is 5.50 m long. At the other end of the bar sits a ball of 3.00 kg but not attached to the bar. How high will the ball go after the collision?

anonymous · Answer

99/49 meters.I calculated the angular velocity of the combined system of the rod along with 2 balls at the instant of striking by applying conservation of angular momentum and got the vertical velocity attained by the 3Kg ball. Tell me if it is incorrect.