a car is driven for 2.0 h at 40.0 km/h, then for another 2.0 at 60 km/h in the same direction
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2015-11-02 20:42:11
Although I think... the average velocity means, total distance over total time so consider the formula speed=distance/time. And break it down, the first part: speed=40 km/h, time 2 h distance= speed *times* time = 40 * 2 = 80 km Then the second part: speed=60 km/h, time 2 h distance= speed *times* time = 60 * 2 = 120 km Total distance / Total time = Average Velocity (keep in mind the basic formula speed=distance/time) therefore, (120+80) km / 4 hrs = 50 km/h Hope I helped :)
2015-11-02 20:43:26
so consider the formula speed=distance/time. And break it down, the first part: speed=40 km/h, time 2 h distance= speed *times* time = 40 * 2 = 80 km
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