Students are completing a lab in which they let a lab cart roll down a ramp. the students record the mass of the cart, the height of the ramp, and the velocity at the bottom of the ramp. the students then calculate the momentum of the cart at the bottom of the ramp. which trial’s cart has the greatest momentum at the bottom of the ramp? trial 1, because this trial has the greatest velocitytrial 2, because this trial has the greatest ramp heighttrial 3, because this trial has a large mass and a large velocitytrial 4, because this trial has the greatest mass