Przypadek C
M=40 kg
m=20 kg
g=10 m/s²
a0=2 m/s²
N-m·g=m·a
M·g-N=M·(a-a0)
N=m·g+m·a
M·g - m·g - m·a = M·a - M·a0
M·g - m·g +-M·a0 = (M+m)·a
a= (g·(M-m) +-M·a0)/(M+m)
a= (10*(40-20) +40*2)/(40+20)
a=(14/3)=4,(6) m/s²
N=m·(g+a)
N=20*(10+(14/3))
N=293,(3) N
