This laboratory work is a fundamental part of the 7th-grade physics curriculum, designed to help students understand how friction operates in the real world through hands-on measurement. Laboratory Work №3: Study of Friction Force
Used to measure the force applied to the object. Wooden block: The primary object being moved.
Place the wooden block on a flat horizontal surface. Attach the dynamometer and pull the block uniformly (at a constant speed). fizika 7klass laboratornaia rabota3 izuchenie sily treniia
When moving at a constant speed, the pulling force shown on the dynamometer is equal to the sliding friction force ( Record this initial value in your data table.
Rougher surfaces like sandpaper will show a significantly higher friction force than smooth surfaces like glass. This laboratory work is a fundamental part of
To investigate the dependence of the sliding friction force on the pressure (load) and the type of contacting surfaces, and to compare sliding friction with rolling friction. 1. Equipment and Materials
You will notice that as the weight increases, the dynamometer reading increases proportionally. Calculation: The friction force is calculated as: Ffr=μ⋅Ncap F sub f r end-sub equals mu center dot cap N is the coefficient of friction and Place the wooden block on a flat horizontal surface
Pull the block across different surfaces (e.g., glass vs. sandpaper) while keeping the weight constant.