A Passenger car (m = 10.0 kg) and a flat car (m = 7.5 kg) collide and move off as shown. The left car was initially traveling at 3.5 m/s right and the right car was initially traveling at a velocity of 2.2 m/s left. a. What was the initial momentum of the right car? b. What was the initial momentum of the left car? c. What was the final velocity of the coupled cars? Remember, velocity has both a magnitude and a direction.

Abox is pushed down at an angle of 32 degrees on a rough surface. the box moves to the right.what equation should be used to find the net force in the y-direction? answers: a. fnet,y = fn - fgb. fnet,y= fp - ffc. fnet,y = fn-fg- fpcos(32)d. fnet,y = fn-fg-fpsin(32)

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct