A 3.00-kg block is moving to the right at 2.80 m/s just before it strikes and sticks to a 1.00-kg block initially at rest. What is the total momentum of the two blocks after the collision? Enter a positive answer if the total momentum is toward right and a negative answer if the total momentum is toward left. A 1420-kg car moving east at 17.0 m/s collides with a 1810-kg car moving south at 15.0 m/s, and the two cars connect together.