Solve the all parts of following question:
Question: A 33.0-kg packing case is initially at rest on the floor of a 1580-kg pickup truck. The coefficient of static friction between the case and the truck floor is 0.30, and the coefficient of kinetic friction is 0.20. Before each acceleration given below, the truck is traveling due north at constant speed.
Part A: Find the magnitude of the friction force acting on the case when the truck accelerates at 2.18m/s2 northward.
Part B: Find the direction of the friction force acting on the case when the truck accelerates at 2.18m/s2 northward.
Part C: Find the magnitude of the friction force acting on the case when it accelerates at 3.64m/s2 southward.
Part D: Find the direction of the friction force acting on the case when it accelerates at 3.64m/s2 southward.
I want help to find the magnitude of the friction force acting on the case.