Question

Urgent dau 8 puncte și coronița va rog repede

Answer 1

[tex] d_{1} = v1t1; d=10s. 5 m/s= 50m; d_{2} = v2t2; d_{2}=20s.20m/s=400m; [/tex]

$v_{m} = \frac{d}{t} = \frac{d1+d2}{t1+t2} = \frac{450m}{30s} =15m/s$