4) If the block has mass of 60 kg and its initial velocity is 1.1 m/s (at x = 3 m), determine the normal force Nwhich the path exerts on the block right before it reaches the spring (at x = 0). Your answer must include 1 place after the decimal point and the proper unit. Take g = 9.81 m/s².

The U-tube shown in Figure Q3 (a) is rotated about one of its arms at an angular speed of o rad/s. At o = 0 rad/s, the U-tube contains 20-cm-high alcohol in both arms Q3 (a) Determine the new o when the elevation difference between the fluid surfaces in the two arms is 30 cm.

That is the answer I already have, I am lookinf for the answers to the blanks in the image

Topic/s: Force System of a Force, Moment of a Force, Moment of a Force-Scalar Formulation,Moment of a Force-Vector Formulation, and Principle of Moment.   Reminder: Kindly show the complete step-by-step solution. Please make sure that your handwriting is understandable and the picture of the solution is clear. I will rate you with “like/upvote” after.   Thank you.