Gerak ing bidang miring tanpa gaya gesekan – aplikasi hukum gerak Newton lan solusine

1. Kothak massa = 2 kg, percepatan amarga gravitasi = 9.8 m/s²Golekana (a) gaya total sing nyepetake kothak mudhun (b) gedhene kothak kasebut percepatan.

solusi

Dikenal:

Massa (m) = 2 kg

Akselerasi amarga gravitasi (g) = 9.8 m/s²

bobot (w) = mg = (2)(9.8) = 19.6 Newton

w_x = w sin 30 = (19.6)(0.5) = 9.8 Newton

w_y = w cos 30 = (19.6)(0.5√3) = 9.8√3 Newton

Solusi:

(a) The jaring kanggoce sing nyepetake kothak kasebut

Bidang miring iku alus, mula ora ana gaya gesekan. Gaya siji-sijine sing tumindak marang obyek yaiku w_x.

∑F = w_x

∑F = 9.8 Newton

(B) gedhene percepatan

∑F = ma

9.8 = (2) a

a = 9.8 / 2

a = 4.9 m/s²

Gedhene percepatan kasebut yaiku 4.9 m/s², arah percepatan mudhun.

2. Bidang miring alus dadi ora ana gaya gesekanMassa obyek yaiku 3 kg, percepatan gravitasi yaiku 9.8 m/s²Temtokake gedhene gaya F yen (a) obyek diam (b) obyek obah mudhun kanthi percepatan tetep 2 m/s² (c) obyek obah munggah kanthi percepatan tetep 2 m/s².

solusi

Dikenal:

Massa (m) = 3 kg

Akselerasi amarga gravitasi (g) = 9.8 m/s²

Bobot (w) = mg = (3)(9.8) = 29.4 Newton

w_x = w sin 30 = (29.4)(0.5) = 14.7 Newton

w_y = w cos 30 = (29.4)(0.5√3) = 14.7√3 Newton

Solusi:

(a) Gedhene gaya F yen obyek diam

Hukum Newton sing pertama Ukara gerak nyatakake yen yen obyek diam, gaya total sing tumindak marang obyek kasebut yaiku nol.

∑F=0

F – w_x = 0

F = w_x

F = 14.7 Newton

(b) Gedhene gaya F yen obyek obah mudhun kanthi konstanta 2 m/s²

∑F = ma

w_x – F = ma

14.7 – F = (3)(2)

14.7 – F = 6

F = 14.7–6

F = 8.7 Newton

(c) Gedhene gaya F yen obyek obah munggah kanthi konstanta 2 m/s²

∑F = ma

F – w_x = ma

F – 14.7 = (3)(2)

F – 14.7 = 6

F = 14.7 + 6

F = 20.7 Newton

[wpdm_package id=’479′]

1. Massa lan bobot
2. Gaya normal
3. Hukum gerak Newton sing kapindho
4. Gaya gesekan
5. Gerak ing permukaan horisontal tanpa gaya gesekan
6. Gerakan rong awak kanthi percepatan sing padha ing permukaan horisontal kasar kanthi gaya gesekan
7. Gerak ing bidang miring tanpa gaya gesekan
8. Gerak ing bidang miring kasar kanthi gaya gesekan
9. Gerakan ing lift
10. Gerakan awak disambungake dening tali lan katrol
11. Rong benda kanthi gedhene percepatan sing padha
12. Ngubengi kurva datar - dinamika gerakan melingkar
13. Ngubengi kurva miring - dinamika gerakan bunder
14. Gerakan seragam ing bunderan horisontal
15. Gaya sentripetal ing gerakan bunder seragam