: Occurs when one body slides over another.
: For sliding friction, the force is proportional to the normal force (weight on a horizontal surface): Ffr=μ⋅Ncap F sub f r end-sub equals mu center dot cap N Ffrcap F sub f r end-sub is the friction force (Newtons, fizika 7 klass kirik sila treniia dostatochnyi uroven
: Prevents an object from starting its motion. It is equal in magnitude to the applied pulling force until the maximum threshold is reached. : Occurs when one body slides over another
Рабочие программы по физике 7-11 класс - УчМет fizika 7 klass kirik sila treniia dostatochnyi uroven
: Occurs when a body rolls (e.g., a wheel); it is usually much smaller than sliding friction for the same materials. 3. Example Problems (Sufficient Level)
At the "Sufficient Level," students are expected to move beyond simple definitions to applying formulas and understanding the physical relationships between variables.