To free a carpet from dust it is beaten with a stick. Give reason. (1) b)The velocity of an object of mass 20 kg changes from 10m/s to 20 m/s in 1 minute, on the application of a constant force. Calculate the magnitude of the force . Calculate the magnitude of the force.
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the reason is that,the carpet moves because of inertia of motion while dust want to remain on its position due to inertia of rest.thus it fall off.
sorry I don't know how to calculate it. :(
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