Question

Calculați viteza medie, știind ca v1 = 1 m/s, t1 = 10 min, v2 = 4 m/s, t2 = 20 min, v3 = 10 m/s, t3 = 20 min

Answer 1

t1=d1/v1=>d1=v1t1 t2=d2/v2=>d2=t2v2 t3=d3/v3=>d3=v3t3 v med=d/t=(d1+d2+d3)/(t1+t2+t3)=(v1t1+v2t2+v3t3)/(t1+t2+t3)=5,8m/s