Acart with mass m1 = 3.2 kg and initial velocity of v1,i = 2.1 m/s collides with another cart of mass m2 = 4.3 kg which is initially at rest in the lab frame. the collision is completely elastic, and the wheels on the carts can be treated as massless and frictionless. what is the velocity of m1 in the center of mass frame after the collision?

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.