Yaadannoo boqonnaa fi gaaffii shaakalaa
Wanti fuula kana irra jiru hundi boqonnaa 2 kitaaba Fiizikii kutaa 10 tiif: wanta boqonnaan haguugu, yaadannoo gabaabaa, gaaffii shaakalaa deebii isaanii waliin, fi viidiyoo barnootaa bakka jirutti.
Kaardiiwwan fuula Fiizikii kutaa 10 irratti boqonnaa kana jala galmaa'an. Tokko tokkoon bani.
Yoom akka itti fayyadamtu
Yeroo saffisni hir'atu yookiin sochii kallattii negaatiivii qabu xiinxaltu itti fayyadami.
Of eeggadhu
Deceleration yeroo hunda saffisa xiqqeessa sababiin isaas acceleration kallattii velocity faallaa dha. Negative acceleration garuu kallattii negaatiivii agarsiisa malee yoo velocity'n negaatiivii ta'e saffisa dabaluu danda'a.
Grade 10 Physics, fuula 28-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e
Yoom akka itti fayyadamtu
Yeroo sochii acceleration dhaabbataa qabu keessatti displacement shallaguuf itti fayyadami.
Of eeggadhu
Kufaatii bilisaa keessatti acceleration g waliin wal qixa ta'a.
Grade 10 Physics, fuula 28-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e
| Gosa Giraafii | Slope | Area Under Curve |
|---|---|---|
| Position-time () | Velocity | Hiika fiizikaalaa hin qabu |
| Velocity-time () | Acceleration | Displacement |
| Acceleration-time () | Hiika fiizikaalaa hin qabu | Jijjiirama velocity |
Yoom akka itti fayyadamtu
Giraafota sochii irraa slope fi area under curve fayyadamuun shallaggiiwwan adda baasuuf itti fayyadami.
Of eeggadhu
Bal'inni giraafii velocity-time jala jiru displacement kenna malee yeroo hunda total distance hin ta'u.
Grade 10 Physics, fuula 28-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e
Yoom akka itti fayyadamtu
Velocity qaama A kan qaama B irraa mul'atu shallaguuf itti fayyadami.
Of eeggadhu
Mallattoon kallattii murteessaadha፤ qaamonni gara walitti yoo deeman tokko poosatiivii kaan negaatiivii ta'a.
Grade 10 Physics, fuula 28-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e
Yoom akka itti fayyadamtu
Sochii acceleration dhaabbataa qabu keessatti velocity xumuraa shallaguuf itti fayyadami.
Of eeggadhu
Yeroo saffisni hir'atu mallattoon acceleration kallattii velocity irraa faallaa ta'a.
Grade 10 Physics, fuula 28-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e
Gaaffii filannoo 10 boqonnaa kana irratti barreeffaman, tokkoon tokkoon isaanii deebii fi sababa qabu. Deebii banuu dura yaali. Gaaffiin kun Ingiliffaa tiin.
Gaaffii 1
A student walks 200 m east from home to a shop, then walks the same way back. What is the displacement for the whole trip?
Deebii: C Zero
Sababa
Displacement is the change in position, measured straight from start to finish. The student finishes exactly where they started, so the displacement is zero. Option A is the distance travelled, which is 400 m, and distance is the quantity that can never come back to zero once you have moved.
Gaaffii 2
A car speeds up from 10 m/s to 30 m/s in 4 s. What is its acceleration?
Deebii: B 5 m/s²
Sababa
Acceleration is the change in velocity divided by the time: a = (30 - 10) / 4 = 20 / 4 = 5 m/s². Option C comes from dividing the final velocity by the time instead of the change in velocity.
Gaaffii 3
A stone is dropped from rest and falls for 3 s. How far does it fall?
Deebii: C 45 m
Sababa
Dropped means the initial velocity is zero, so s = ut + (1/2)at² becomes s = (1/2)(10)(3²) = (1/2)(10)(9) = 45 m. Option B is what you get by using v = u + at, which gives the final speed of 30 m/s rather than a distance.
Gaaffii 4
Which equation of motion would you use when the question never mentions time?
Deebii: C v² = u² + 2as
Sababa
Each equation leaves out one quantity. v² = u² + 2as is the only one with no t in it, so it is the one to reach for when time is neither given nor asked for. Every other option contains t.
Gaaffii 5
A driver travelling at 20 m/s brakes at 4 m/s². How far does the car travel before it stops?
Deebii: C 50 m
Sababa
Time is not mentioned, so use v² = u² + 2as with v = 0 and a = -4 m/s², because the acceleration opposes the motion. Then 0 = 400 + 2(-4)s, so 8s = 400 and s = 50 m. Option A is what you get by finding the stopping time, 5 s, and reporting it as a distance.
Gaaffii 6
On a velocity against time graph, what does the area under the line represent?
Deebii: B Displacement
Sababa
Velocity multiplied by time gives displacement, and that product is exactly what the area represents. The slope of the same graph gives acceleration, which is why option A is the common wrong choice.
Gaaffii 7
A ball is thrown straight upward. At the highest point of its flight, what are its velocity and acceleration?
Deebii: B Velocity zero, acceleration 10 m/s² downward
Sababa
At the top the ball has stopped rising and has not yet started falling, so its velocity is zero for that instant. Gravity never switches off, so the acceleration is still 10 m/s² downward, which is what starts the ball moving down again. Option A is the most common wrong answer, and it would mean the ball hangs there forever.
Gaaffii 8
A bus travelling at 72 km/h needs its speed in metres per second. What is it?
Deebii: B 20 m/s
Sababa
Divide by 3.6 to convert km/h into m/s: 72 / 3.6 = 20 m/s. The conversion comes from 1000 metres per kilometre divided by 3600 seconds per hour. Option D multiplies by 3.6 instead of dividing.
Gaaffii 9
Two buses travel along the same road in opposite directions, one at 60 km/h and the other at 50 km/h. What is the magnitude of their relative velocity?
Deebii: C 110 km/h
Sababa
Taking one direction as positive, the second bus has a velocity of -50 km/h. Relative velocity is 60 - (-50) = 110 km/h. Option A would be right only if they were travelling the same way, which is why the sign matters so much in these questions.
Gaaffii 10
A minibus starts from rest and accelerates uniformly, reaching 24 m/s after 6 s. How far does it travel in that time?
Deebii: B 72 m
Sababa
Both velocities and the time are known, so use s = ((u + v) / 2)t = ((0 + 24) / 2) x 6 = 12 x 6 = 72 m. Option C comes from multiplying the final velocity by the time, which would only be right if the bus had travelled at 24 m/s the whole way.
Boqonnaan 2 Maxxansa Ministeera Barnootaa keessatti fuula 28 hanga fuula 59 ti.
Maxxansa Ministeera Barnootaa, Ingiliffaa, Fuula 212
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