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Answer Posted / veena rawat
Hydraulic brakes:-Brakes used by the action of water are due to some liquid pressure. These are most economical and effective brakes. It was discovered by Nobel in 1876. It works on the following principle of Pascal. According to this law any fluid cannot be compressed and any pressure applied to a liquid will be transmitted equally in all directions. Thus by giving a pressure through a lever handle which is attached in brake the same pressure at all the wheels of a carriage is felt and it acts as a brake
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