Question

Ajutati-ma si pe mine ,va rog, la 41

Answer 1

a) m₂=200 g=0,2 kg

m₁=0,45 g=0,45*10⁻³ kg

l=λ/2=>λ=2l=2*2=4 m

v=√(Te/μ)

Te=m₂g=0,2*10=2 N

μ=m₁/l=0,45*10⁻³/2=0,225*10⁻³ kg/m

v=√(Te/μ)=√(2/0,225*10⁻³)=√8888=94,27 m/s

λ=v/ν=>ν=v/λ=94,27/4=23,5 Hz

b) l=λ₁=2 m

v₁=λ₁ν=2*23,5=47 m/s

v₁=√(Te₁/μ)

Te₁=m₂'g=10m₂'

μ=m₁/l=0,45*10⁻³/2=0,225*10⁻³ kg/m

v₁=√(Te₁/μ) |()²<=>v₁²=Te₁/μ<=>47²=10m₂'/0,225*10⁻³<=>2209*0,225*10⁻³=10m₂'<=>0,49=10m₂'=>m₂'=0,49/10=0,049 kg

G₂'=m₂'g=0,049*10=0,49 N