Yaadannoo boqonnaa fi gaaffii shaakalaa

Boqonnaa 3 Fiizikii kutaa 9: Sosochii Sarara Qajeelaa

Wanti fuula kana irra jiru hundi boqonnaa 3 kitaaba Fiizikii kutaa 9 tiif: wanta boqonnaan haguugu, yaadannoo gabaabaa, gaaffii shaakalaa deebii isaanii waliin, fi viidiyoo barnootaa bakka jirutti.

5
Kaardii: 10
Gaaffii shaakalaa boqonnaa 3: 36–59
Fuula kitaabaa boqonnaa 3

Boqonnaan 3 maal haguuga

1.Position, Distance and Displacement
2.Average Speed and Instantaneous Speed
3.Average Velocity and Instantaneous Velocity
4.Acceleration
5.Uniform Motion
6.Graphical Representation of Motion

Yaadannoo gabaabaa boqonnaa 3

Kaardiiwwan fuula Fiizikii kutaa 9 irratti boqonnaa kana jala galmaa'an. Tokko tokkoon bani.

Average AccelerationFoormulaa

\vec{a}_{av} = \frac{\vec{v}_f - \vec{v}_i}{t_f - t_i} = \frac{\Delta \vec{v}}{\Delta t}

\vec{a}_{av} = \frac{\vec{v}_f - \vec{v}_i}{t_f - t_i} = \frac{\Delta \vec{v}}{\Delta t}

$\vec{a}_{av}$: Saffisiisa giddu-galeessaa $m\,s^{-2}$
$\vec{v}_f$: Velositi dhumaa $m\,s^{-1}$
$\vec{v}_i$: Velositi jalqabaa $m\,s^{-1}$
$\Delta \vec{v}$: Jijjiirama velositi $m\,s^{-1}$
$\Delta t$: Garaagarummaa yeroo $s$

Yoom akka itti fayyadamtu

Yeroo murtaa'e keessatti saffisa jijjiirama velocity herreguuf itti fayyadami.

Of eeggadhu

Qaamni tokko yoo saffisa hir'ise, velocity xumuraa isa jalqabaa gadi waan ta'uuf acceleration negatiivii (deceleration) ta'a.

Grade 9 Physics, fuula 36-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e

Average SpeedFoormulaa

v_{av} = \frac{s_{tot}}{t_{tot}}

v_{av} = \frac{s_{tot}}{t_{tot}}

$v_{av}$: Saffisa giddu-galeessaa $m\,s^{-1}$
$s_{tot}$: Fageenya waliigalaa $m$
$t_{tot}$: Yeroo waliigalaa $s$

Yoom akka itti fayyadamtu

Fageenya waliigalaa imalame yeroo waliigalaa fudhatameen qooduun herreguuf itti fayyadami.

Of eeggadhu

Herreguu dura yuunitiiwwan jijjiiri. km/h gara m/s jijjiiruuf 10/36 tiin baay'isi.

Grade 9 Physics, fuula 36-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e

Average VelocityFoormulaa

\vec{v}_{av} = \frac{\Delta \vec{S}}{\Delta t} = \frac{\vec{S}_f - \vec{S}_i}{t_f - t_i}

\vec{v}_{av} = \frac{\Delta \vec{S}}{\Delta t} = \frac{\vec{S}_f - \vec{S}_i}{t_f - t_i}

$\vec{v}_{av}$: Velositi giddu-galeessaa $m\,s^{-1}$
$\Delta \vec{S}$: Qaxxaamura $m$
$\vec{S}_f$: Iddoo dhumaa $m$
$\vec{S}_i$: Iddoo jalqabaa $m$
$\Delta t$: Garaagarummaa yeroo $s$
$t_f$: Yeroo dhumaa $s$
$t_i$: Yeroo jalqabaa $s$

Yoom akka itti fayyadamtu

Kallattii murtaa'e keessatti yeroo kennameef saffisa jijjiirama iddoo herreguuf itti fayyadami.

Of eeggadhu

Displacement kan murtaa'u bakka jalqabaa fi xumuraa qofaan. Fageenya waliigalaa daandii irra imalame miti.

Grade 9 Physics, fuula 36-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e

Hiika Giraafota MotionGabatee wabiiS-t · v-t

Giraafii	Slope	Bal'ina Giraafii Jalaa
$S-t$	velocity	Hiika fiizikaalaa hin qabu
$v-t$	acceleration	distance yookiin displacement

Yoom akka itti fayyadamtu

Giraafota position-time fi velocity-time irraa velocity, acceleration, yookiin distance argachuuf itti fayyadami.

Of eeggadhu

Slope giraafii v-t acceleration yoo ta'u, bal'inni giraafichaa jalaa distance yookiin displacement kenna. Slope fi area walitti hin makiinaa.

Grade 9 Physics, fuula 36-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e

Displacement Imala DeebiiDogoggora baratame

Yoom akka itti fayyadamtu

Qaamni tokko erga imalee bakka ka'umsa isaatti yommuu deebi'u itti fayyadami.

Of eeggadhu

Qaamni tokko gara bakka ka'umsaatti yoo deebi'e, displacement fi average velocity zeeroo ta'u, garuu total distance fi average speed zeeroo ol ta'u.

Grade 9 Physics, fuula 36-59 irraa qophaa'e; osoo hin ba'in dura yeroo lama mirkanaa'e

Gaaffii shaakalaa boqonnaa 3

Gaaffii filannoo 10 boqonnaa kana irratti barreeffaman, tokkoon tokkoon isaanii deebii fi sababa qabu. Deebii banuu dura yaali. Gaaffiin kun Ingiliffaa tiin.

Gaaffii 1

Which of the following statements correctly differentiates between distance and displacement?

A.Distance is a scalar quantity, while displacement is a vector quantity.
B.Distance is a vector quantity, while displacement is a scalar quantity.
C.Distance depends only on the initial and final positions.
D.Displacement is always greater than distance.

Deebii fi sababa agarsiisi

Deebii: A Distance is a scalar quantity, while displacement is a vector quantity.

Sababa

Distance is the total path length traveled and has no direction, so it is a scalar quantity. Displacement is the change in position in a specific direction, which makes it a vector quantity.

Gaaffii 2

Which instrument in an automobile is used to measure its instantaneous speed?

A.Odometer
B.Speedometer
C.Thermometer
D.Barometer

Deebii fi sababa agarsiisi

Deebii: B Speedometer

Sababa

A speedometer shows the speed of a vehicle at a specific instant in time, which is its instantaneous speed.

Gaaffii 3

What physical quantity is represented by the slope of a position-versus-time graph?

A.Acceleration
B.Total distance
C.Velocity
D.Displacement

Deebii fi sababa agarsiisi

Deebii: C Velocity

Sababa

The slope of a position-versus-time graph is the rise (change in position) over run (change in time), which gives velocity (v = ΔS / Δt).

Gaaffii 4

A student walks 500 m from home to school in Bahir Dar and then returns home along the exact same path. What is the student's total displacement for the entire trip?

A.0 m
B.500 m
C.1000 m
D.250 m

Deebii fi sababa agarsiisi

Deebii: A 0 m

Sababa

Displacement depends only on the initial and final positions. Because the student returns to the starting point (home), the final position equals the initial position, so the displacement is 0 m.

Gaaffii 5

A train travels on a straight track from Addis Ababa towards Mojo at a constant speed. If it covers a distance of 2400 meters in 80 seconds, what is its speed?

A.30 m/s
B.40 m/s
C.60 m/s
D.100 m/s

Deebii fi sababa agarsiisi

Deebii: A 30 m/s

Sababa

Speed is calculated as distance divided by time: v = s / t = 2400 m / 80 s = 30 m/s.

Gaaffii 6

A car accelerates uniformly from rest to a speed of 20 m/s in 10 seconds. What is the acceleration of the car?

A.0.5 m/s2
B.1 m/s2
C.2 m/s2
D.5 m/s2

Deebii fi sababa agarsiisi

Deebii: C 2 m/s2

Sababa

Starting from rest means initial velocity v_i = 0. Acceleration is a = (v_f - v_i) / Δt = (20 m/s - 0 m/s) / 10 s = 2 m/s².

Gaaffii 7

A bus travels along a straight highway from Hawassa at a constant speed of 90 km/h. How far does the bus travel in 15 minutes?

A.12.5 km
B.22.5 km
C.30.0 km
D.50.0 km

Deebii fi sababa agarsiisi

Deebii: B 22.5 km

Sababa

Convert time to hours: 15 minutes = 15 / 60 hours = 0.25 hours. Then distance is s = v × t = 90 km/h × 0.25 h = 22.5 km.

Gaaffii 8

A cyclist rides 3 km west and then turns around to ride 2 km east. What is the net displacement of the cyclist?

A.1 km west
B.1 km east
C.5 km west
D.5 km east

Deebii fi sababa agarsiisi

Deebii: A 1 km west

Sababa

Taking west as negative and east as positive, the displacement is -3 km + 2 km = -1 km, which means 1 km west.

Gaaffii 9

An airplane lands on a runway with an initial velocity of 70.0 m/s and decelerates at 1.50 m/s² for 40.0 s. What is its final velocity?

A.0.0 m/s
B.10.0 m/s
C.60.0 m/s
D.130.0 m/s

Deebii fi sababa agarsiisi

Deebii: B 10.0 m/s

Sababa

Deceleration is negative acceleration (a = -1.50 m/s²). Using v_f = v_i + aΔt: v_f = 70.0 m/s + (-1.50 m/s² × 40.0 s) = 70.0 m/s - 60.0 m/s = 10.0 m/s.

Gaaffii 10

Which of the following is correct for an object undergoing uniform rectilinear motion?

A.Its acceleration is zero, and the area under its velocity-time graph gives the distance covered.
B.Its acceleration is constant and positive, and the slope of its position-time graph is zero.
C.Its instantaneous velocity is always different from its average velocity.
D.The velocity-time graph is a vertical line.

Deebii fi sababa agarsiisi

Deebii: A Its acceleration is zero, and the area under its velocity-time graph gives the distance covered.

Sababa

In uniform rectilinear motion, velocity is constant, which means acceleration is zero (a = 0). The area under a horizontal velocity-time graph represents the distance traveled (s = v × t).

Appiin boqonnaa kana irratti gaaffii 12 qaba; utuu hojjettuu ni sirreessa. Kan asii jiran 10 jalqabaa ti.

Fuula kitaabaa boqonnaa 3

Boqonnaan 3 Maxxansa Ministeera Barnootaa keessatti fuula 36 hanga fuula 59 ti.

Maxxansa Ministeera Barnootaa, Ingiliffaa, Fuula 179

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Yaadannoo gabaabaa Fiizikii kutaa 9 hunda

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