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~ F ( ) ~ 1/m 2. : , , , = F /m (3.1)F = m (3.2) 1 N = 1 kg m / s2 ( 1 1 )

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2. . : ! ( ) = (Q)F=ma, F=Q, , gQ = mg

1,0 .Q = mg=1,0 kg x 9,80 m/s2 =9,8 N ( , ) Q = mg=1,0 kg x 1,67 m/s2 =1,7 N . .

m Q = mg , , ? , ( ) SFy=Fz-mg=0, Fz=mg

SFy=Fz-mg=mayFz=mg+may=m(g+ay) mg=40 N, ay =2,00m/s2Fz=mg(1+ay/g)=40 N(1+2,00/9,80)=48,2N

SFy=Fz-mg=mayFz=mg+may=m(g+ay) mg=40 N, ay =-2,00m/s2Fz=mg(1+ay/g)=40 N(1-2,00/9,80)=31,8N ? !

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! 1 - - ?FL=F-Q-Qp=406,3 N !

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