Motion+and+Forces

Here is a website for static forces (Tension, Compression, etc) on bridges.[|PBS Bridge Building]

Dave Z. - how fast can you run or walk? at

Sherri- make your own coordinate grid using floor tiles or tape. and have kids move around on it.

Standard 2f- 2nd law lab using the 6th grade energy cars- Set the 6th grade energy car level and use a photogate at start and at 70 cm. Tie a fishing line to the car and pass it through the hole at the end of the track, Attach the line to a ziplock with washers in it and set it up so it can freely fall. The car is the mass and the ziplock with washers is the force. Measure both with spring-scales but use the correct side for each. Now you can change the mass or the force and see how that changes the acceleration of the car. The acceleration = 2d/t squared. d is .7 m. This lab gives very good clear results.

Gravity and a good connection to astronomy. Make a model of an orbiting body like what you find at; [] You can use a pvc pipe, fishing line, rubber cork, and washers for cheap materials. Simplify the math- at 8th grade you are trying to teach how gravity keeps an abject in orbit. you can change the variables of mass and radius of orbit/

More gravity from Kathy B-

Two friction labs from Sherri S-