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Physics Rotational Mechanics Level: High School

Rotational equilibrium

A lunch tray is being in one hand , as the drawing illustrates . The mass of the tray itself is 0.120 kg , and its center of gravity is located at its geometrical center . On the tray is a 1.00 kg plate of food and a 0.215 kg cup of coffee . Obtain the force T exerted by the thump and the force F exerted by the four fingers . Both forces act perpendicular to the tray , which is being held parallel to the ground