How so you calculate the net force on an object if two forces are acting on it in the same direction

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

What is the equation for electrical work?

Arrange the images in order to show how lake-effect snow occurs.