The image contains three problems related to mechanics, specifically dealing with moments (torques), force systems, and their effects. Below is a brief overview of each problem:

1. Moment at Point O: You are asked to calculate the moment at point O for a force of 100 N acting at a point 2 m from O, in a system shaped like a right-angle. The distance of the force is given along with the corresponding angle.

2. Resultant Moment of a Couple: In this problem, you are required to calculate the resultant moment (or torque) of a couple formed by two forces of 150 lb and 200 lb, acting in opposite directions along a triangular system. The moment arms and geometry are provided.

3. Resultant Force and Location on a Beam: For this last system, you need to determine the resultant force and its location from point O on a beam. The beam has a distributed load of 6 kN/m and a concentrated load of 15 kN. You'll need to find the equivalent concentrated load and its location.

Would you like me to break down any of the problems or provide solutions to any of them? Let me know if you'd like details for each one.