1. x is the 2nd digit of your UFID.  2. If you think there is a mistake in problem statement, please write down your assumption, and solve your problem based on your assumption.  3. Make sure your handwriting is recognizable. 4. Please show your work step by step (similar as how I did in example problems in class). We will grade your work by checking your understanding of each step. Having correct final answer without steps showing us how won’t get any points for the problem. Of course, if the correct answer is because of cheating, then it’s DSO’s decision on how to deal with it.  5. Show all your work on paper from the first page to the last page using webcam before you exit Honorlock. Once you exit Honorlock, you cannot change anything on your paper.  6. Submit your work on “Exam 1 submission” as a single pdf file.  7. Both Honorlock “Exam 1” and “Exam 1 submission” will be available for everyone start from 6:55 pm to 11:05 pm. a.  For majority students without extra time allowed, please finish this exam within 2 hours and submit it on “Exam 1 submission” before 9:05 pm. b.  For students with 50% extra time allowed, please finish this exam within 3 hours and submit it on “Exam 1 submission” before 10:05 pm. c.  For students with 100% extra time allowed, please finish this exam within 4 hours and submit it on “Exam 1 submission” before 11:05 pm.   Late submission is allowed with penalty. For every one minute late, there will be 2 points off.  For students with extra time allowed, please put your extra time allowed in the comment when you submit.  9. This is a close-book, close-note exam. Make sure you don’t have textbook, lecture notes, or homework solutions around you.  10. Do not use Chegg or any other similar website. Any violation in exam will be reported to Dean of Students Office directly. Based on our experience, a lot of times online solutions are wrong and we figured out students using online solutions because their answer were wrong in a weird way. You should definitely trust yourself better than those “Chegg expert”. 

For the pin at C, it’s considered as failure when shear stress reaches (400+x) ksi. Calculate the diameter of the pin if safety factor is 3.  Please type the pin diameter in the box below. 

Force F = (1+x) kN is applied at A. The cross section of bar AB is circular with radius 10 mm. If a horizontal plane (indicated in red) passing through D, calculate the normal stress and shear stress on this plane.  Please type the allowable shear stress in the box below.

What I can do to make it easier for you to learn the material in this course? Anything you want me to change or anything you like that you want to make sure I don’t change.  Please write down your answer on the paper you will submit. No need to type anything in the box. 

In which one of the following situations is linear momentum not conserved?

A solid sphere of radius R rotates about a diameter with an angular speed w. The sphere then collapses under the action of internal forces to a final radius R/2. What is the final angular speed of the sphere?

The initial velocity of a 4.0-kg box is 11 m/s, due west. After the box slides 4 m horizontally, its speed is 1.5 m/s. Determine the magnitude and the direction of the non-conservative force acting on the box as it slides.

Holly puts a box into the trunk of her car. Later, she drives around an unbanked curve that has a radius of 48 m. The speed of the car on the curve is 16 m/s, but the box remains stationary relative to the floor of the trunk. Determine the minimum coefficient of static friction for the box on the floor of the trunk.  

Water is flowing through a pipeline at the speed of 5 m/s when it encounters a vertical bend in the pipe raising it by 4.0 m. After the rise, the speed of flow reduces to 4 m/s. The cross-sectional area of the pipe does not change. What is the difference in pressure (PB – PA) in the portions of the pipe before and after the rise?  

A rock weighs 30 N in air and 25 N when completely submerged in a fluid with a density of 750 kg/m3.   Determine the density of the rock.