1969-1970 Ford Mustang Boss 429: Muscle Cars In Detail No. 7

1969-1970 Ford Mustang Boss 429: Muscle Cars In Detail No. 7

Fisika tolong aku plisss bbaanggtt​

tolong aku plisss bbaanggtt​

Jawaban:

1.

diketahui:

s = 20 m

g = 10m/s² ==> a = -10 m/s² (krn gravitasi mrpk perlambatan dlm soal ini)

kecepatan awal minimum ==> v akhir (ketika mencapai mangga) = 0

v = vo + at

0 = vo + (-10)t

10t = vo

t = vo/10

s = vot + ½at²

20 = vo(vo/10) + ½(-10)(vo/10)²

[tex]20 = \frac{ {vo}^{2} }{10} - \frac{ {vo}^{2} }{20} [/tex]

[tex]20 = \frac{ {vo}^{2} }{20} [/tex]

vo² = 400

vo = 20 m/s

2.

diketahui:

vo = 10m/s

vox = 10 cos30° = 5√3 m/s

voy = 10 sin30° = 5 m/s

a = -g = -10 m/s

yo = 100m

y = 0

a.

y = yo + voy•t + ½at²

0 = 100 + 5t + ½(-10)t²

0 = 100 + 5t - 5t²

t² - t - 20 = 0

(t-5)(t+4) = 0

t = 5s (krn t harus positif, tidak mungkin -4)

b.

(horizontal mrpk GLB)

x = vox•t

= 5√3 × 5

= 25√3 m

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