Question

Problema 6 repede dau coroană!

Answer 1

m=50 de ce?

Presupun m=50g=0,05 kg

M=200g=0,2 kg

Δl1=2 cm=0,02 m

Δl2=1 cm=0,01 m

Fel1=Fel2=G=mg=0,05*10=0,5 N

Fel1=k1Δl1=>k1=Fel1/Δl1=0,5/0,02=25 N/m

Fel2=k2Δl2=>k2=Fel2/Δl2=0,5/0,01=50 N/m

Fel=G'=Mg=0,2*10=2 N

ks=k1k2/(k1+k2)=25*50/(25+50)=1250/75=16,66 N/m

Fel=ksΔl=>Δl=Fel/ks=2/16,66=0,12 m=12 cm