In a lab experiment, you are given a 1 meter ruler, a pivot triangle and 3 equal masses of 10g each as shown in figure above. Arrange the position of each mass so that the system is in equilibrium. Draw
again the diagram (Figure 4) to locate the position of each mass hang on the ruler, sketch and label
the free body diagram, and show by calculation to prove that the system is equilibrium. (Let the mass
of the metre ruler = 58)

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90