Today we had a "Board Meeting" where students presented solutions to the homework problems. Here is a sample showing how to calculate the work done on an object in three different situations.
Remember the main idea with work is that if a force is exerted on an object and causes the object to move in the same direction as the force, then work is done on the object and it gains some energy.
I read to the class Feynman's famous block analogy for energy. You can read it again here if you like. Get excited for our new building project next week!