A spring has a stiffness of 20 kN/m and its length is changed from 100 mm to 110 mm. How much work has been done to generate this change in length? O 1000 J O 0.001 J O1 MJ O1J

1: Determine the magnitude of F, and length y if F;=1500 N and x =1.75 m. You may assume that the tension in a rope on one side of a pulley is equal to the tension in the rope on the other side of the pulley. In making this assumption, you are neglecting the effects of friction. 2m

5a. If lengths a=1.2m, b=3.7m, c=1.6m, d=4, e=1.4m, and f=4.3m, determine the angle (in degree) between the forces F_A and F_B. Answer must include 1 place after the decimal point. 5b. If lengths a=1.1m, b=4.8m, c=1.1m, d=3.2, e=1.3m, and f=3.2, determine the moment (in N*m) caused by force F_A about axis OD. Answer must include 1 place after the decimal point. Negative sign must be included if the rotational tendenct about the OD axis (from O to D) is clockwise. 5c. Find out all support reaction components at the fixed support O after being given all forces and lengths. ( use the 2nd image  named practice problem 5-2 for this question)