Help me give my students the opportunity to examine the effect friction has upon moving objects and discover why friction impede the free movement of objects. They will understand the relationship between force, friction and mass.
I teach at a small public school nestled in the rural outskirts of town. It is a k-8 school and middle school. My students come from very supportive families and home environments, however, many are from economically disadvantaged households.
Despite any and all potential hurdles, my students display high levels of interest and engagement.
I teach 8th grade as the only middle school science (physics and chemistry) teacher. Thank you for your interest and please help support our dissection project!
Students are introduced to the concept of friction as a force that impedes motion when two surfaces are in contact. Students will work in teams to use a spring scale to drag an object such a wood plank along a table top.
Students will start adding different weights to the plank, try to move it, and measure the force under which the plank just begins to move.
They use the spring scale to measure the frictional force that exists between the moving plank and the surface on which it slides.
As they add more weight, it becomes clear that the amount of force required keeps increasing. This is because the weight pushing the plank downwards increases the frictional force between the plank and surface, and so requires a greater force to overcome it.
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