if you push a wooden crate across rough ground with a force F over a distance d. a constant frictional force of magnitude f acts opposite in direction to the displacement what is the potential energy stored in the system due to these forces

positive reinforcement? ?

do you have a formula possibly

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.