Jim'sCosmicScience

This editable PowerPoint presentation introduces Newton's 3rd Law and gives example of action and reaction force pairs. Agent-Object notation is introduced and used to explain the surprising reason why Normal force and Weight are equal and opposite, but NOT an Action-Reaction pair. When you dive off of a cliff, you and the entire earth fall towards each other with equal and opposite forces! (But very unequal accelerations)

In this presentation, a (secretly lazy) horse studies physics at night in the barn and uses Newton's 3rd Law to convince a farmer that it is futile to pull on a wagon since "if I pull on the wagon, the wagon exerts an equal and opposite force on me". Agent-Object notation is explained and used to analyze the three (horizontal) interactions: horse/ground, horse/wagon, & wagon/ground. Ends with an activity for small groups with whiteboards or paper to assess understanding.

This Editable PowerPoint reviews the 1st and 2nd Laws, and then introduces a taxonomy of Names and Symbols for commonly encountered forces; contact and non-contact. Four real-life examples are used to show how to identify the forces present (and not present!) and create an accurate properly labelled Free Body Diagram. Finally, the Normal force is explained at a micro-physical level, and common confusions dispelled.

This PowerPoint provides definitions for power and efficiency in terms of rates for both work and energy transformation. Three example problems guide students through solving problems that involve finding time, power, or energy. Units utilized include Watts, Horsepower, seconds, hours, and Joules.

This fully editable PowerPoint defines Newton 1st Law in 3 ways. It gives rich historic context as to how Galileo demolished the physics of Aristotle, and shows with examples the concepts of Force, Net Force, as well as Static and Dynamic Equilibrium.

This fully editable Powerpoint explains freefall and its relationship to astronauts experiencing weightlessness while in orbit. Finally, Einstein's "happiest thought" and his revolutionary Principle of Equivalence is introduced, the crucial first step in Einstein's formulation of a radical new theory of gravity. Nine links to videos and simulations are embedded for educators who want to open up more depth and wonder!

This well designed and fully editable PowerPoint presentation explains the formula that relates weight, mass, and the acceleration of gravity. Includes 3 fully worked example word problems that show the cancellation and combination of SI units.