2) a 5 lb force pulls at an angle of 25º, as measured counterclockwise from the +x axis, on a
box having a mass of 7 kilograms. the box is on a horizontal surface and the coefficient of
friction between the box and the surface is 0.20. determine the following:
a) what is the mass of the box expressed in slugs ?
b) what is the weight of the box, expressed in pounds?
c) what is the magnitude of the normal force acting on the box?
d) what is the magnitude of the frictional force acting on the box?
e) what is the net force acting along the line of motion acting on the box?
f) what is the acceleration of the box, expressed in ft/s? ?
g) if the box starts at rest, and the forces act throughout the motion, calculate how far
the object travels in 3 seconds. express the answer in feet.
h) if the box starts at rest, and the forces act throughout the motion, calculate how fast
the box is travelling at 3 seconds. express the answer in ft/sec
i) what is the kinetic energy of the box at 3 seconds (again, the forces act throughout
the motion)? express your answer in both ft lbs.

what are the options.

explanation:

close lines strong magnet less close weaker

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