Object a with a mass of 1.5 kilograms is moving with a velocity of +11.2 meters/second (moving in the +x direction). it has a perfectly elastic collision with stationary object b that has a mass of 4.5 kilograms. after the collision, object b travels with a velocity of +5.6 meters/second. what is the final velocity for object a?

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.