The tool at A is used to hold a power lawnmower blade stationary while the nut is being loosened with the wrench. If a force P is applied to the wrench at B in the direction shown, determine the moment it creates about the nut at C. What is the magnitude of force F at A so that it creates the opposite moment about C?

Given:
P = 50 N b = 300 mm
θ = 60 deg c = 5
a = 400 mm d = 12