A particle moves in straight line A to Be for the 30km with speed 101km/h and the next 60km with speed 20km with speed 20km/h. Find the average speed and average velocity.
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Answer:
Avg. Speed= Avg. Velocity= 15m/s
Hope that the answer helps you!
Explanation:
Speed = Distance / Time
Therefore,
T1 = D1/S1 = 30/10 = 3s
T2 = D2/S2 = 60/20 = 3s
Avg speed = Total distance / Total time = 30+60/3+3 = 90/6 = 15m/s
Avg Velocity = V1+V2/2 (harmonic mean) = 10+20/2 = 15m/s
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