Perfect elastic collisions

4. the mass of ball a is 10 kilograms and the mass of ball b is 5 kilograms. if the initial velocity is set to 3 meters per second for each ball, what is the final velocity of ball b if the final velocity of ball a is 2 meters per second? use the elastic collision equation to find the final velocity of ball b. assume ball a initiall moves from right to left and ball b moves in the opposite direction. identify each mass, velocity, and unknown. show your work, including units, and indicate the direction of ball b in your answer.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

this is poiselle's equation from fluid mechanic in physics. mech eng