meter stick has a mass of 0.30 kg and balances at its center. When a small chain is suspended from one end, the balance point moves 1.0 cm toward the end with the chain. Determine the mass of the chain.

Two children of mass 21 kg and 26 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If the children are separated by a distance of 2 m, at what distance from the pivot point is the small child sitting in order to maintain the balance? m

Alunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.237 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.19-kg plate of food and a 0.241-kg cup of coffee. Obtain (a) the force 7 exerted by the thumb and (b) the force exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground. 0.400 m 0.380 m 0.240 m 0.100 m 0.0600 m henc henc

A 7-kg mass (m1) hangs from a cord that runs through a pulley and back down to attach to a 6-kg mass (m2) that is hanging from the other side. The pulley has a mass of 5.00-kg and a diameter of 20-cm. Find: A) the tension in the cord supporting m1 and the tension in the cord supporting m2; B) the tension in the cord supporting the pulley. C) Why is the answer to B) not equal to the sum of tensions in A)? Why is it not equal to the sum of the three weights?