A uniformly dense picnic table with a mass mt of 15 kg with a total length of 3.6 m sits on a flat surface. A student pushes a uniformly dense rock with an unknown mass mr on the table to a distance x = 0.30 m away from the right table leg, such that the table is just about to tip over. Use your Statics Problem Solving Checklist to answer the questions below. Redraw the table on your own paper, and draw the free body diagram (FBD) for the table.
Indicate the (smart) point you chose about which the system will rotate, justify this choice.
What is the mass of the rock mr in kg?
What is the normal force exerted by the ground on the right table leg?
Explain why the normal force exerted by the ground on the left table leg is zero.
Explain why you are able to ignore the Fx=0 condition for equilibrium?

so here is the information for current research:

-nrel's geothermal analysts, scientists, and engineers perform a full range of research from developing advanced methods of locating and accessing geothermal resources to exploring innovative technologies to extract and produce clean energy from the heat of the earth

and here is the information for the technology of geothermal energy:

-it's clean and sustainable

-resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma

-almost everywhere, the shallow ground or upper 10 feet of the earth's surface maintains a nearly constant temperature between 50° and 60°f (10° and 16°c)

-geothermal heat pumps can tap into this resource to heat and cool buildings

-a geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building

-in the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system

-in the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger

-the heat removed from the indoor air during the summer can also be used to provide a free source of hot water

dang that balls went far

cant without the picture! ?

explanation:

wheres the pic