You see lightning and hear the thunder 6.0 seconds later. If the speed of sound is 340 m/s, how far away was the lightning?
2040 m

6120 m

58 m

24.5 km

0.0176 m

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?