Test:121 QNo:2

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An electron changes its velocity from 100m/s towards south to 100m/s towards west in 0.1 seconds.
The average acceleration is given by?

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santoshprasad ·2010-02-20 21:41:34

pls explain me

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Arka Halder ·2010-02-20 22:21:20

change in vel=final vel - initial vel
= -100i - (-100j)
= -100i+100j
thus the change in vel is âˆš(100²+100²)=100âˆš2 in a direction 45Â°W of North.
acc=(change in vel)/time=100âˆš2/0.1=1000âˆš2 in direction 45Â°W of North

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Test:121 QNo:2

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