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

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=