Fisika Gerak Harmoni Sederhana

  • July 2020
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Elastisitas

Gerak Harmoni

Periode Frekuensi Sudut Konstanta Pegas Simpangan GHS Kecepatan Percepatan Energi

Kinetik Energi

Energi

T= 1/F w= 2πf = 2π/ T K = m.(ω)² y = A.sin θ GHS θ/2 π = t/T

y = A.sin 2 πY

Y=

y= A.sin ωt v = ω.A.cos ωt a= - (ω)² A.sin ωt keterangan A(-),0,+y

Back

y(-),+A,

V=0 amax= -(ω)².A + A Ep = ⅟₂ K.(A)² Ek = 0 Em = ⅟₂ k. (A)² = Ep +Ek

back

aa

V= ±ω.√A²-y²

a= - ω².y +y

Ep = ½.k.y²

Ek = ½.K. (A²-y²) Em= Ep+Ek = ½.k.A²

back

Vmax = ±ω.A a=0

0 Ep = 0 Ek = ½.k. A² Em = Ep+Ek = ½.k. A² back

V = ±ω.√A²-y² a = -ω²y Ep= ½.k. y² y(-) Ek = ½.k.( A²- y²) Em = Ep + Ek = ½.k. A²

back

V= 0 a = - ω²A

A(-)

Ep= ½.k. A²

Ek= 0 Em= Ep+Ek = ½.k. A²

back

• • • • • • • • • • • • • •

keterangan T = waktu untuk 1 getaran ( sek) f= banyaknya getaran dalam 1 detik(Hz) A=amplitudo(m,cm) ω=kecepatan/ frekuensi sudut ( rad/s) M = massa beban ( kg ) θ = sudut fase ( rad) Y = fase t= waktu (sek) Y= simpangan ( m, cm) V= kec getar partikel(m/s,cm/s) a= percepatangetar partikel (m/s² , cm/s² ) Ep = energi potensial ( j ) Ek = energi kinetik (j) Em= energi mekanik ( j ) back

Tegangan Regangan Modulus Young Elastisitas

Usaha Gaya Energi Potensial

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Konstanta Pegas

τ = F/A e = ∆l/l E=τ/e Elastisitas

W = ∆Ep F = k . ∆l = m.a Ep = 0,5.k.∆l Seri k = E.A/ lo

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Paralel

Hubungan Antara “Gerak Harmonis dan Elastisitas” Pegas Periode Ayunan Sederhana

Hukum II Newton tentang gerak : F = -k . y = m . a … (1) Pada gerak Harmonik: y = A sin ω.t …(2) a = -(ω² . y) … (3) -k. A sin ω.t = m . a -k. A sin ω.t = m . –(ω².y) k. A sin ω.t = m . ω².y K = m . ω² ω = 2πf k = m . (2πf)² 1 m = 2π f k

T = 2π =

m k

f =

1 k 2π =m

(x-1)

Nama Kelompok: Sianne Michael Jack Windy Arya Kevin

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