Fizika 7 Klass Kirik Sila Treniia Dostatochnyi Uroven May 2026

: Prevents an object from starting its motion. It is equal in magnitude to the applied pulling force until the maximum threshold is reached.

: 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

: 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) : Prevents an object from starting its motion

is pulled along a horizontal floor. The coefficient of friction is : A force that arises during the relative

At the "Sufficient Level," students are expected to move beyond simple definitions to applying formulas and understanding the physical relationships between variables.

: A force that arises during the relative motion or attempted motion of two contacting bodies and is directed opposite to the direction of motion.