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m2=4kg
α=30⁰
f=0,2
a=?
Fs-siła zsuwająca
N-napięcie nici
Fs=mgsinα
T=fmgcosα
m1a=N-Fs-T
m2a=m2g-N
a(m1+m2)=m2g-Fs-T
a=(m2g-Fs-T)/(m1+m2)
a=(m2g-m1gsinα-fm1gcosα)/(m1+m2)
a=(4*10-2*10*0,5-0,2*2*10*0,87)/(2+4)
a=(40-20-3,48)/6=
16,52/6=2,75[m/s²]