: Measure the friction force as the block slides over different materials (e.g., wood vs. sandpaper) while keeping the weight constant.
: Compare the force needed to slide the block with the force needed to roll it on two pencils. 999eb879-6108-48ba-bfb7-73017ec1352b.docx : Measure the friction force as the block
: To investigate the dependence of the sliding friction force on the normal pressure force and the type of contacting surfaces, and to compare sliding friction with rolling friction. Equipment : Spring dynamometer. Wooden block. Set of weights (approx. 100g each). Contact surfaces (e.g., wooden board, glass, sandpaper). Two round pencils (for measuring rolling friction). Procedure : 999eb879-6108-48ba-bfb7-73017ec1352b
: Attach the dynamometer to the block and pull it uniformly (at a constant speed) across the surface. The dynamometer reading equals the friction force. Set of weights (approx
Laboratory work No. 3 for 7th-grade physics, titled focuses on experimentally investigating how the force of sliding friction depends on the weight (pressure) of a body and the nature of the contact surfaces. Laboratory Work Structure
: Measure the friction force with the empty block, then repeat by adding 1, 2, and 3 weights to increase the pressure force.