1. Ana jefa ƙaramin ƙwallo a kwance tare da gudun da ba ya canzawa na m10/s. Ƙwallon ta bugi bango kuma tana nuna da irin wannan gudun. Menene canjin motsi na layi na ƙwallon?
An sani:
Nauyi (m) = 0.2 kg
Saurin farko (v o ) = -10 m/s
Gudun ƙarshe (v t ) = 10 m/s
Alamomin ƙari da raguwa suna nuna cewa abubuwan suna motsawa a akasin alkibla.
Ana so : canjin motsi na layi (Δp)
Magani:
Tsarin canjin motsi na layi :
Δp = mv t - mv o = m (v t - v o )
Canjin motsi na layi:
Δp = 0.2 (10 - (-10)) = 0.2 (10 + 10)
Δp = 0.2 (20)
Δp = 4 kg m/s
[irp]
2. Kwallo mai nauyin gram 10 ta faɗi cikin 'yanci daga tsayi, ta bugi ƙasa a gudun mita 15/s, sannan ta yi nuni sama a gudun mita 10/s. Ka ƙayyade motsin!
An sani:
Nauyi (m) = gram 10 = 0.01 kg
Saurin farko (v o ) = -15 m/s
Saurin ƙarshe (v t ) = 10 m/s
Ana so: Impulse (I)
Magani:
Motsin (I) yayi daidai da canjin motsin (Δp)
I = mv t - mv o = m (v t - v o )
Sha'awa:
I = 0.01 (10 – (-15)) = 0.01 (10 + 15)
I = 0.01 (25)
I = 0.25 kg m/s
[irp]
3. An jefa ƙwallon gram 200 a kwance da gudun mita 4/s, sannan aka buga ƙwallon a daidai wannan hanyar. Tsawon lokacin da ƙwallon ta taɓa jemage shine daƙiƙa 2 mil l kuma saurin ƙwallon bayan ya bar jemage shine mita 12/s. Girman ƙarfin da batter ɗin ke yi akan ƙwallon shine ...
An sani:
Nauyi (m) = gram 200 = 0.2 kg
Saurin farko (v o ) = 4 m/s
Saurin ƙarshe (v t ) = 12 m/s
Tazarar lokaci (t) = milis 2 = daƙiƙa (2/1000) = daƙiƙa 0.002
Ana so : Girman ƙarfin (F)
Magani:
Tsarin motsin rai:
I = F t
Tsarin canjin yanayin motsi:
mv t - mv o = m (v t - v o )
Motsin (I) yayi daidai da canjin motsin (Δp)
I = Δp
F t = m (v t – v o )
F (0.002) = (0.2)(12 – 4)
F (0.002) = (0.2)(8)
F (0.002) = 1.6
F = 1.6 / 0.002
F = 800 Newton
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