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# A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity becomes 40 m/s towards north. The average acceleration of the body is

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#### Initial velocity u=30^iFinal velocity v=40^jChange in velocity Δv=40^j−30^iMagnitude |Δv|=√302+402=50Average acceleration a=|Δv|Δt=5010=5 m/s2

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