What is the average velocity in m/y of a tectonic plate that has traveled 9000 km to the south in 60 million years

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

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?