Răspuns :
F=ma=>m=F/a=8/4=2 kg
a=Δv/Δt=v/t=>v=at=4t
P=Fv<=>60=8*4t=>t=60/32=1,875 s
P=L/t=>L=Pt=60*1,875=112,5 J
L=F*d=>d=L/F=112,5/8≅14 m
F=ma=>m=F/a=8/4=2 kg
a=Δv/Δt=v/t=>v=at=4t
P=Fv<=>60=8*4t=>t=60/32=1,875 s
P=L/t=>L=Pt=60*1,875=112,5 J
L=F*d=>d=L/F=112,5/8≅14 m