To calculate friction force we multiply the friction coefficient m which you can get from a friction coefficient table by normal force N which is mass multiplied by gravity. The average friction force is 025N in opposite direction to direction of stone. F m N m F N N F m Where F Frictional Force m Friction Coefficient N Normal Force Example The Friction coefficient is 4 and normal force is 2 N.
F fric can be broken down to m k F N where m k is the coefficient of friction and F N is the normal force.
The force of friction depends on the friction coefficient for the type of friction under consideration and the. Wf Ff d Where Wf Work Done by Frictional Force Ff Frictional Force d Distance Moved. F m v f v iD t. F represents the applied force.