As the mass oscillates on a spring, when is displacement at its maximum and velocity equal to zero? a. when it is partially compressed b. when it is at the equilibrium position c. when it is fully stretched d. when it is at near rest

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.