Posted by **MeganErin** on Sunday, September 12, 2010 at 2:51pm.

A car travels in a straight line with an average velocity of 85 km/h for 2.5 h and then with an average velocity of 30 km/h for 1.5 h.

(a) What is the total displacement for the 4 h trip?

_____________________ km

(b) What is the average velocity for the total trip?

_____________________ km/h

I dont even know where to start please help me :) thankk youuuuuu

- physics -
**bobpursley**, Sunday, September 12, 2010 at 2:53pm
distance=velocity*time

On the first, do it in two parts, then add.

On the second, avg velocity= totaldistanc/totaltime.

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