📡Physics Courses Channel, Department of Physics, Addis Ababa University, from 2023 - Present🔭

Photo from Dr. Endalkachew M.

Suppose a plane is flying at an altitude of 560 m above the ground, as shown in the figure. From the top of a tower that is 260 m high, an observer measures the angle of elevation to the plane to be 60°. Find the horizontal distance between the tower and the plane.

http://docs.google.com/forms/d/e/1FAIpQLScHNSeuVrapYCHuEBwfKrlkFcA1r5DAgatJIdwwnMfDV0I9nw/viewform?o%20uid=108268214708731970683

To my students @ MoD BPHYS 1105 Final Exam Results (40%) Maximum: 68/80 ===>>> 34/40 Minimum: _

To my students @ AAU, I have noticed that some students are submitting their assignments without including their name, class, and ID, which has made it challenging to record their scores in the system.

የመጨረሽያ ማስጠንቀቂያ🚨! እስካሁን የPhys 1011 አሳይመንት እንዲሁም የላብራቶሪ ሪፖርት አጠናቅቃችሁ ያላስገባችው ተማሪዎች ቀጥሎ ለሚፈጠረው ማንኛውም ችግር ሙሉ ኋላፊነቱ የራሳችሁ መሆኑን ለመጨረሻውያ ጊዜ ለማሳሳብ እወዳለው! ከሰላምታ ጋር!

ማሳሰብያ እባካችሁ በተደጋጋሚ በፈተናው ዙርያ "inbox" የምታደርጉልኝ የአአዩ ተማሪዎች ይሄ ከላይ የቀረበው ፈተና እናንተን የሚመለከት አይደለም! ይሄ የተዘጋጀው በመከላከያ ስር ለሚማሩት ተማሪዎች ብቻ ነው። የእናንተ ሌላ ነው!

For your information (For students @ MoD only) Summary:- 1) Linear momentum: 15 Qns 2) Heat & Thermodynamics: 20 Qns 3) SHM: 15 Qns 4) Electromagnetism: 30 Qns Total: 80 Qns

For your information (For students @ MoD only)

Dear Students, Good evening. This is a reminder for those who have missed the lab classes: please report to the Physics lab on the ground floor tomorrow (January 29, 2026) at 8:30 AM. Regarding the final exam, you are permitted to use non-programmable scientific calculators only. Please do not bring any rough paper; the department will provide it in the exam room.

Following this correction, the revised maximum score on the exam is 30/30. 👍👍👍

Phys 1011 Mid-Exam Correction on MCQ #6 / #7 (depending on your exam type — Type I or Type II): The correct answer is: 52 m to the right of the origin. Please note that the total displacement from t = 0  s to t = 4  s is 92 m, but this is displacement relative to the starting point, not relative to the origin. The question asks for the position relative to the origin after 4 s, which is x_f = 92 m - 40 m = +52  m.

Notice of Re-Exam Schedule Dear Students, This is to inform you that the re-exam will be held on Monday, Dec 22, 2025, at 1:30 PM (afternoon). Location: Dep't of Physics, 4-Kilo Best regards,