Final answer:
When the conveyor belt starts moving, the bag will experience a net force due to the friction. The force of kinetic friction can be calculated using the equation f k = μkmg cos θ.
Step-by-step explanation:
In this scenario, the bag of mass m rests on a conveyor belt inclined at an angle θ with the horizontal. The coefficients of friction between the bag and the belt are represented by μs and μk, where μs is the coefficient of static friction and μk is the coefficient of kinetic friction. When the conveyor belt suddenly starts moving with a constant velocity v, the bag will experience a net force f due to the friction between the bag and the belt.
To calculate the friction, we can use the equation f k = μkmg cos θ, where f k is the force of kinetic friction, μk is the coefficient of kinetic friction, m is the mass of the bag, g is the acceleration due to gravity, and θ is the angle of the inclined belt with the horizontal.