This experiment would address the Ohio State 8th grade science standards: Forces between objects act when the objects are in direct contact or when they are not touching. • Forces have magnitude and direction. Ohio (PS: 8th).
Students need 3 different sized weights, string, blocks and cell phones to complete this experiment. Timers are also acceptable.
Students use these materials to find the acceleration of a block off of a table and then apply their data to the forces on the block. If frictional forces are less than gravitational weight the block will accelerate.
Student directions on a fill in worksheet as well as suggested correct answers on a teacher file are included. Students are expected to fill in a hypothesis as well as identify variables, but the directions and materials are provided. - suggestions for inquiry variations as well as differentiation are provided.