Question

Qi-
Physics
An object travels 20 metres in 4 sec and other 20 metres in 5 sec.calculate the average speed.
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Answer 1

Answer:

3.5m/s

Explanation:

We know that ,

Speed = distance/time.

Speed of object in 1st interval = 20/4 = 5 m/s

Speed of object in 2nd interval = 20/10 = 2 m/s

Average speed = (5+2)/2 = 3.5 m/s

Answer 2

Answer:

speed =distance/time

in 1st case speed=20/4=5m/sec

in 2nd case speed=20/5=4m/sec

therefore AS=(5+4)m/sec=9m/sec

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