Physics

What happens to the slinky? Watch the video to find out!

carnegie mellon robotics academy

A great game to challenge understanding of position vs time and velocity vs time plots

Samford University: How to Get the Most out of Studying Five part series.  VERY good.

Objectives for a physics course

Sample materials for Learning the Game of Science.  Students have to read board game moves to determine the rules of the game.  Like scientists collect data to determine the rules of the universe.

Let's estimate he can push down with a force about a quarter of his weight. If he weighs 200 pounds, this would result in a force of 50 pounds, or 225 N. We also know that the force of friction (F) between his feet and the asphalt depends on the force with which he pushes down (N) and the "coefficient of kinetic friction"(μ) between the soles of his shoes, which we will assume are made of rubber, and the pavement. F = μN The μ between rubber and asphalt varies between 0.5 and 0.8. Let's assume a value of 0.7. Therefore, solving for stopping distance, we get: D = ½(2100kg)(18m/s)2/(0.7)(225N) = 2160 meters, or over 1.3 miles! The situation might be improved if he exerted his full 200 pounds, or 900 Newtons, of force against the ground. In that case: D = 1/2(2100kg)(18m/s)2/(0.7)(900N) = 540 meters (about a third of a mile) However, the amount of torque exerted on his ankles and knees might make that a problematic proposition.