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Qormaata galuumsa kutaa 12ffaa Fiiziksii, bara 2017 A.L.I (2025), maxxansa 2

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 2 qaba; kaan gadi aanee tarreeffamaniiru.

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  • 2017 A.L.I (2025), maxxansa 2

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  • Gaaffilee 50 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 2

Two trains are traveling towards each other on parallel tracks. Train X is moving west at 80 km/h, Train Y moving east at 60 km/h. If you are on Train X, what is the velocity of Train Y relative to Train X?

  1. A.140 km/h towards the east
  2. B.60 km/h towards the west
  3. C.20 km/h towards the west
  4. D.140 km/h towards the west
Deebii fi ibsa ilaalaa

Deebii: A 140 km/h towards the east

Maaliif

Relative velocity is the difference of two velocities. Take east as positive, so train Y has vY=+60v_Y = +60 km/h and train X has vX=−80v_X = -80 km/h because it travels west. Then vY/X=vY−vX=60−(−80)=+140v_{Y/X} = v_Y - v_X = 60 - (-80) = +140 km/h, and the plus sign means the direction is east. Option D carries the right number but the wrong direction. It comes from adding the two speeds and then keeping the heading of your own train instead of the heading the subtraction gives.

Gaaffii 3

Which of the following is a correct action-reaction force pair?

  1. A.The force of a ball hitting a wall and the force of gravity pulling the ball down.
  2. B.The force of a car's tires pushing backward on the road and the road pushing the car forward.
  3. C.The force of the bat hitting a ball and the force of air resistance on the ball.
  4. D.The force of a swimmer's arms pushing water backward and the force of gravity pulling them down.
Deebii fi ibsa ilaalaa

Deebii: B The force of a car's tires pushing backward on the road and the road pushing the car forward.

Maaliif

A Newton's third law pair comes from one single interaction and its two forces act on two different bodies. The tyres push backwards on the road and the road pushes the car forwards: same contact, equal size, opposite directions, different bodies. Option D is the tempting one, because pushing water backwards is a genuine action force, but its partner is the water pushing the swimmer forwards. The pull of gravity on the swimmer belongs to a separate interaction with the Earth.

Gaaffii 4

A 0.25 kg ball moving at 4 m/s collides inelastically with a stationary ball of mass 0.75 kg. After collision they stick together. What is the kinetic energy lost?

  1. A.4 J
  2. B.2 J
  3. C.3.5 J
  4. D.1.5 J
Deebii fi ibsa ilaalaa

Deebii: D 1.5 J

Maaliif

Momentum is conserved through the collision. Before impact p=0.25×4=1p = 0.25 \times 4 = 1 kg m/s, and the two balls move off together as one 1 kg body, so v=1/1=1v = 1/1 = 1 m/s. Kinetic energy before is 12(0.25)(4)2=2\tfrac{1}{2}(0.25)(4)^2 = 2 J and after is 12(1)(1)2=0.5\tfrac{1}{2}(1)(1)^2 = 0.5 J, so 2−0.5=1.52 - 0.5 = 1.5 J is lost to heat, sound and deformation. Option B (2 J) is the energy the moving ball started with, not the amount lost, and some of that energy survives as the motion of the pair.

Gaaffii 5

A block weighing 200 N is placed on a frictionless inclined plane that rises to a height of 3 m over a distance of 12 m along the plane. What is the mechanical advantage (MA) of the inclined plane?

  1. A.1.67
  2. B.3.00
  3. C.4.00
  4. D.6.00
Deebii fi ibsa ilaalaa

Deebii: C 4.00

Maaliif

For a frictionless inclined plane the mechanical advantage is the length of the slope divided by the height it lifts through: MA=Lh=123=4MA = \frac{L}{h} = \frac{12}{3} = 4. The 200 N weight is extra information that the formula does not need. Option B (3.00) is tempting because 3 m is printed in the question, but mechanical advantage is a ratio of two forces or two lengths and carries no unit, so a bare height cannot be the answer.

Gaaffii 6

What is the main characteristic of a third-order lever?

  1. A.The fulcrum is at one end, with the effort on the other end.
  2. B.The load is positioned between the effort and the fulcrum.
  3. C.It has a mechanical advantage greater than one.
  4. D.The effort is applied between the load and the fulcrum.
Deebii fi ibsa ilaalaa

Deebii: D The effort is applied between the load and the fulcrum.

Maaliif

Levers are classed by what sits in the middle. In a third class lever the effort is applied between the fulcrum and the load, as in the human forearm, a pair of tweezers or a fishing rod. Because the effort arm is then shorter than the load arm, this class always has a mechanical advantage below one and trades force for speed and range of movement. Option B describes the second class lever, where the load is in the middle, as in a wheelbarrow.

Gaaffii 7

Considering the relationship between atmospheric pressure and altitude, which evaluation best explains the challenges faced by climbers at high elevations?

  1. A.Climbers are less affected by low atmospheric pressure because they are physically fit.
  2. B.Decreased atmospheric pressure at high altitudes leads to reduced oxygen levels, which can impair physical performance and increase fatigue.
  3. C.Climbers do not need to acclimatize as atmospheric pressure has no significant impact on their performance.
  4. D.High atmospheric pressure at altitudes enhances climbers' endurance and reduces fatigue.
Deebii fi ibsa ilaalaa

Deebii: B Decreased atmospheric pressure at high altitudes leads to reduced oxygen levels, which can impair physical performance and increase fatigue.

Maaliif

Air pressure falls as altitude rises, so each breath of air holds fewer oxygen molecules and the partial pressure of oxygen in the lungs drops. Less oxygen reaches the blood and the working muscles, which brings on breathlessness, headache and quick fatigue. This is why climbers spend days acclimatising before attempting a high summit. Option D reverses the physics: atmospheric pressure decreases with altitude, it does not increase.

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Gaaffilee 50 kuusaa kana keessa jiran hunda akka waraqaa qormaataa maxxanfameetti, furtuu deebii ibsa 50 waliin immoo akka faayilii lammaffaatti. Maxxansaa yookiin daataa malee dubbisaa.

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Qormaatilee Fiiziksii biroo bara 2017 A.L.I

2017 A.L.I (2025)2017 A.L.I (2025), maxxansa 1

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 50 qaba; tokkoon tokkoon isaanii deebii fi ibsa gara kitaaba barnootaatti qajeelchu qabu.

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