A10 kg body is forced against a horizontal elastic spring compressing it an amount of 0.5 m. when the
body was released, it moves on a horizontal surface a distance of 3 m before coming to rest. the force
constant of the spring is 500 n/m. what is the coefficient of friction between the block and the surface.

What do radio waves and microwaves have in common? both are at the side of the spectrum that has the shortest wavelengths. both are at the side of the spectrum that has the lowest radiant energy. both are at the side of the spectrum that has the lowest frequency. both are found next to visible light on the electromagnetic spectrum.

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

What is friction? how does it affect the motion of an object?