Срочно!!!!!!!!!!!!!!

Question

Срочно!!!!!!!!!!!!!!

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Answer 1

2) A = F*s*cosa=20*10*cos60=200*0,5=100Дж
4) m1*v1+m2*v2=(m1+m2)*v; v=(m1*v1+m2*v2)/(m1+m2)=(1*5+0,5*4)/1,5=
=7/1,5=4,66 м/с