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Qormaata galuumsa kutaa 12ffaa Fiiziksii, bara 2017 A.L.I (2025), maxxansa 1

Gaaffilee dhugaa qormaata galuumsa yunivarsiitii kutaa 12 kan Fiiziksii, akkuma barattoonni bara 2017 A.L.I itti fudhatanitti. Tokkoon tokkoon gaaffii deebii sirrii fi ibsa qaba. Qormaanni bara 2017 A.L.I maxxansa adda addaatiin bahe. Fuulli kun maxxansa 1 qaba; kaan gadi aanee tarreeffamaniiru.

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  • 2017 A.L.I (2025), maxxansa 1

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  • Gaaffilee 42 deebii waliin

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Gaaffilee qormaata kanaa yaalaa

Deebii banuun dura tokkoon tokkoon gaaffii ofii keessaniin deebisaa. Ibsi gara kutaa kitaaba barnootaa sirriitti waan qajeelchuuf, yeroo gaaffii dogoggortan fuula kam irra deebi'uu akka qabdan ni beektu.

Gaaffii 1

If the tail of vector B is placed at the tip of A and the tail of C is placed at the tip of B, the sum of the three vectors is drawn from the:

  1. A.Tail of A to tip of B
  2. B.Tail of B to tip of C
  3. C.Tail of A to tip of C
  4. D.Tip of C to tail of B
Deebii fi ibsa ilaalaa

Deebii: C Tail of A to tip of C

Maaliif

Vectors add head to tail. Once B starts where A ends and C starts where B ends, the single vector that replaces all three runs from the tail of the very first one to the tip of the very last one. The first is A and the last is C, so the sum is drawn from the tail of A to the tip of C. Option A is a real resultant, but only of A+BA + B. It stops before C is counted.

Gaaffii 2

Which one of the following is not correct about the difference between distance and displacement?

  1. A.Distance is the total length of path travelled by an object in a given time
  2. B.Displacement is the shortest path between the initial and final positions.
  3. C.Distance depends on the path followed by the object it moves.
  4. D.Displacement can be more than or equal to the magnitude of distance
Deebii fi ibsa ilaalaa

Deebii: D Displacement can be more than or equal to the magnitude of distance

Maaliif

The question asks which statement is wrong. Displacement is the straight line from the starting point to the finishing point, while distance is the whole path walked. A straight line between two points cannot be longer than any other route between them, so the magnitude of displacement is always less than or equal to the distance. They are equal only when the motion is in one straight line with no turning back. Statement D claims displacement can be more than the distance, so D is the wrong statement and the answer. Statement B sounds loose, but calling displacement the shortest path between the two positions is the accepted description, so it is not the one at fault.

Gaaffii 3

A 25.0 kg block is initially at rest on a horizontal surface. A horizontal force of 75.0 N is required to set the block in motion. After it is in motion, a horizontal force of 60.0 N is required to keep the block moving with constant speed. Find the coefficients of static and kinetic friction respectively (g = 10 m/s²).

  1. A.0.1 & 0.2
  2. B.0.3 & 0.2
  3. C.0.2 & 0.3
  4. D.0.2 & 0.1
Deebii fi ibsa ilaalaa

Deebii: B 0.3 & 0.2

Maaliif

The block presses down with its weight, so the normal force is N=mg=25×10=250N = mg = 25 \times 10 = 250 N. The 75 N is the force needed to break it loose, which measures static friction: μs=75/250=0.3\mu_s = 75/250 = 0.3. The 60 N keeps it sliding at constant speed, which measures kinetic friction: μk=60/250=0.24\mu_k = 60/250 = 0.24, and the paper rounds this to 0.2. So the pair is 0.3 and 0.2. Option C has the same two numbers in the opposite order. Kinetic friction is always the smaller of the two, so the bigger coefficient has to be the static one.

Gaaffii 5

Which one is not true about action and reaction forces?

  1. A.They cancel out each other
  2. B.They act on two different bodies
  3. C.They are same type
  4. D.They exist in pairs
Deebii fi ibsa ilaalaa

Deebii: A They cancel out each other

Maaliif

This asks for the statement that is not true. Newton's third law says the action and the reaction act on two different bodies. Two forces can only cancel when they pull on the same body, so an action and reaction pair never cancels. That makes A the false statement and the answer. Option B is tempting to tick because it also sounds like something you could argue with, but it is true, and it is the very reason A is false.

Gaaffii 6

A net force F₁ acting on a mass m causes an acceleration 'a'. When the force is tripled, the acceleration increased by 6. What will be the new acceleration acting on the same mass?

  1. A.6 m/s²
  2. B.18 m/s²
  3. C.12 m/s²
  4. D.9 m/s²
Deebii fi ibsa ilaalaa

Deebii: D 9 m/s²

Maaliif

Use F=maF = ma twice with the same mass. At first F=maF = ma. With the force tripled, 3F=ma′3F = ma', so a′=3aa' = 3a. The question says the acceleration went up by 6, so a′=a+6a' = a + 6. Setting the two equal: 3a=a+63a = a + 6, which gives a=3a = 3 m/s². The new acceleration is a′=3×3=9a' = 3 \times 3 = 9 m/s². Option A, 6 m/s², is the amount the acceleration increased by, not the new value itself.

Gaaffii 7

The magnitude of vector A is half of the magnitude of vector B. When they act parallel to each other, they yield a resultant of 90 units. The magnitudes of A and B respectively are:

  1. A.A=60, B=30
  2. B.A=37, B=53
  3. C.A=30, B=60
  4. D.A=53, B=37
Deebii fi ibsa ilaalaa

Deebii: C A=30, B=60

Maaliif

Vectors that act parallel to each other add like ordinary numbers. Let B be the larger one. Then A=B/2A = B/2, and A+B=90A + B = 90 gives B2+B=90\tfrac{B}{2} + B = 90, so 1.5B=901.5B = 90 and B=60B = 60 units. Then A=30A = 30 units. Option A carries the same two numbers but attaches them the wrong way round. The question says A is the half, so A has to be the smaller value.

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Gaaffilee 42 kuusaa kana keessa jiran hunda akka waraqaa qormaataa maxxanfameetti, furtuu deebii ibsa 42 waliin immoo akka faayilii lammaffaatti. Maxxansaa yookiin daataa malee dubbisaa.

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Qormaatilee Fiiziksii biroo bara 2017 A.L.I

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Qormaatilee Fiiziksii kan waggoota biroo

2018 A.L.I (2026)2018 A.L.I (2026), maxxansa 12018 A.L.I (2026), maxxansa 22016 A.L.I (2024)2016 A.L.I (2024), Tigraay2016 A.L.I (2024), marsaa 1Fakkeenyaa, bara 2016 A.L.I2015 A.L.I (2023)2014 A.L.I (2022)2013 A.L.I (2021)2012 A.L.I (2020)2011 A.L.I (2019)2010 A.L.I (2018)2009 A.L.I (2017)2008 A.L.I (2016)2007 A.L.I (2015)2006 A.L.I (2014)2005 A.L.I (2013)

Qormaatilee kana fakkaatan dabalataa

Qormaatilee Fiiziksii kutaa 12ffaa hundaQormaatilee bara 2017 A.L.I hundaGosa barnootaa fi bara hunda

Qormaata kana taa'uu dura Fiiziksii qayyabadhu

Yaadannoon gabaabaan Fiiziksii kutaa 12 kaardii 28 qaba. Tokkoon tokkoon boqonnaa boqonnaadhaan kitaaba biyyaalessaa irraa qophaa'ee seericha, mallattoowwan isaa maal bakka akka bu'an fi dogoggora qabxii nama dhabsiisu ni ibsa.

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Kunneen gaaffilee dhugaa qormaata galuumsa Fiiziksii bara 2017 A.L.I ti?

Eeyyee. Qormaata galuumsa yunivarsiitii biyyaalessaa kan Fiiziksii barattoonni bara 2017 A.L.I (2025) fudhatan irraa fudhataman. Kuusaan keenya gaaffilee isaa 42 qaba; tokkoon tokkoon isaanii deebii fi ibsa gara kitaaba barnootaatti qajeelchu qabu.

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