1.why luggage trolley has wheels
2.WHY AEROPALANE HAVE STREAMLINED SHAPE
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1. rolling reduces friction hence it is easier to pull the trolley
2.The special shape given to the bodies moving in the fluids like ships in water and aeroplanes in the air to reduce the fluid friction is called streamlined shape
2.The special shape given to the bodies moving in the fluids like ships in water and aeroplanes in the air to reduce the fluid friction is called streamlined shape
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ON A RUBBING GLASS ROD WITH SILK CLOTH WHAT TYPE OF CHARGE IS GENERATED IN (a) SILK CLOTH (b) glass rod
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1. Since luggage has to move here and there,so to reduce the friction luggage has wheels.It reduces the contact area making more easy to move.
2. Aeroplane has also a streamlined shape to reduce the friction produced by air.
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