Final answer:
To find the coefficient of friction working against motion, use the formula: Frictional force = coefficient of friction × normal force.
Step-by-step explanation:
To find the coefficient of friction working against motion, we can use the formula:
Frictional force = coefficient of friction × normal force
In this case, the normal force is equal to the weight of the object, which is given by:
Normal force = mass × acceleration due to gravity
Substituting the values into the formulas, we can solve for the coefficient of friction. In this case, the coefficient of friction is equal to 0.065.