PHYS 2101 Midterm: PHYS 2101 LSU 2008s 3
Physics 2101, Fourth Exam, Spring 2008
Name (print legibly): _____________________________________________
Signature: ______________________________________________________
Section (circle one)
1 (Rupnik, MWF 8:40 AM) 4 (Rupnik, MWF 2:40 PM)
2 (Giammanc0, MWF 10:40 AM) 5 (Rupnik, TuTh 9:10 AM)
3 (Gonzalez, MWF 12:40 PM) 6 (Sheehy, TuTh 12:10 PM)
■ Please be sure to print and sign your name above, and circle your section. Also write your seat number.
■ Please turn OFF all cell phones, pagers, iPods, MP3s, etc.
■ The formula sheet is provided as a separate item. No other reference material is allowed during the exam.
■ For the questions, no work need be shown, and there is no partial credit.
■ For the problems, please write as much as you can explaining to us your reasoning. Lonely correct answers
will not receive full credit, and lonely wrong answers will receive no credit at all.
■ You may use scientific or graphing calculators, but you must derive answers and explain your work.
■ Carry units throughout your calculations. Lack of units will result in loss of points.
■ GOOD LUCK!
Seat Number:
F
P1 P3
P2
Question 1 (12 points)
The figure shows a hydraulic system consisting of a tank of ideal, incompressible liquid, and three pistons:
P1, P2, and P3. A downward force, F, is applied to piston P1 as shown. All pistons are at the same level, as
drawn.
a) (4 points)
Directly beneath the pistons, where is the pressure in the fluid the greatest?
i) under P1
ii) under P2
iii) under P3
iv) all the pressures are the same
b) (4 points)
Which piston experiences the greatest upwards force?
i) P1
ii) P2
iii) P3
iv) all three pistons experience the same upwards force
v) none of the pistons experience an upwards force
c) (4 points)
If the force, F, is applied continuously, which piston moves the farthest?
i) P1
ii) P2
iii) P3
iv) all three pistons move the same distance
v) none of the pistons move at all
Document Summary
Please be sure to print and sign your name above, and circle your section. Please turn off all cell phones, pagers, ipods, mp3s, etc. The formula sheet is provided as a separate item. No other reference material is allowed during the exam. For the questions, no work need be shown, and there is no partial credit. For the problems, please write as much as you can explaining to us your reasoning. Lonely correct answers will not receive full credit, and lonely wrong answers will receive no credit at all. You may use scientific or graphing calculators, but you must derive answers and explain your work. Lack of units will result in loss of points. Good luck: under p1, under p2, under p3. P3: all the pressures are the same. The figure shows a hydraulic system consisting of a tank of ideal, incompressible liquid, and three pistons: A downward force, f, is applied to piston p1 as shown.
