2- Tim has 40 kg mass and is going to play see-saw with his brother, Jack, who has only 15 kg mass. The sea-saw is 3 meters long and assume the moving part is a solid rod of mass 60 kg. pivoted in the middle. Tim has Jack sit on one side and the sea saw has an angle of 20 degrees with horizontal now. Then he suddenly sits on the other side and you know what happens! (Moment of inertia of point-like particle rotating about a radius r is mr² and that of a uniform rod of length L about its COM is ML²) 12 A) Find the total torque about the pivot due to Tim and Jack at the moment Tim jumps on. B) Calculate the total moment of inertia of the system about the pivot. C) Find Jack's angular acceleration once Time sits on the other side.

2- Tim has 40 kg mass and is going to play see-saw with his brother, Jack, who has only 15 kg mass. The sea-saw is 3 meters long and assume the moving part is a solid rod of mass 60 kg. pivoted in the middle. Tim has Jack sit on one side and the sea saw has an angle of 20 degrees with horizontal now. Then he suddenly sits on the other side and you know what happens! (Moment of inertia of point-like particle rotating about a radius r is mr² and that of a uniform rod of length L about its COM is ML²) 12 A) Find the total torque about the pivot due to Tim and Jack at the moment Tim jumps on. B) Calculate the total moment of inertia of the system about the pivot. C) Find Jack's angular acceleration once Time sits on the other side.