4. Two forces of 80N and 100N acting at an angle of 60°with each other pull an object. Determine the net force using the parallelogram method. 5. A disoriented professor drives 5.5 km east, then 4.2 km north then 2.5 km northwest. Find the magnitude and direction of the resultant displacement using the polygon method. 6. Vector M of magnitude 4.8 m is at 60° counterclockwise from the +x-axis. It is added to vector N and the resultant is a vector of magnitude 4.8 m, at 40° counterclockwise from the +x-axis. Find the magnitude and direction of vector N by parallelogram method.

4. Two forces of 80N and 100N acting at an angle of 60°with each other pull an object. Determine the net force using the parallelogram method. 5. A disoriented professor drives 5.5 km east, then 4.2 km north then 2.5 km northwest. Find the magnitude and direction of the resultant displacement using the polygon method. 6. Vector M of magnitude 4.8 m is at 60° counterclockwise from the +x-axis. It is added to vector N and the resultant is a vector of magnitude 4.8 m, at 40° counterclockwise from the +x-axis. Find the magnitude and direction of vector N by parallelogram method.