Question

ajutoooor, de o ora ma chinui sa o fac

Answer 1

m=m₁+m₂=0,8+0,2=1 kg

Ecmax=Epmax=>mv₀²/2=kA²/2 |:2=>mv₀²=kA²=>A²=mv₀²/k=1*0,2²/100=0,04/100=0,0004=>v₀=√0,0004=0,02 m=2 cm

Ffs=m₂ω²x

Ffs.max=m₂ω²A

Ffs.max≤Ff₁=>m₂ω²A≤μm₂g |:m₂=>ω²A/g≤μ

k=mω²=>ω²=k/m=100/1=100=>ω=√100=10 rad/s

ω²A/g≤μ<=>10²*0,02/10≤μ<=>0,2≤μ