In a free market economy, the decisions made by buyers and sellers push the price of a good or service toward the price ceiling equilibrium price price floor

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)