(mu) is the dimensionless , which depends on the materials and surface quality.
: Occurs when one body slides over another. fizika 7 klass kirik sila treniia dostatochnyi uroven
. What force is required to move the crate at a constant speed? : Calculate gravity force: Calculate friction: (mu) is the dimensionless , which depends on
Note: For constant speed, the pulling force must equal the friction force. Task : To pull a sled at a constant speed, a force of is applied. Find the coefficient of friction. Solution : 4. Key Takeaways for Kirik's Methodology What force is required to move the crate at a constant speed
At the "Sufficient Level," students are expected to move beyond simple definitions to applying formulas and understanding the physical relationships between variables.
: 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)
is pulled along a horizontal floor. The coefficient of friction is