Question

what is the significance of law of machine​

Answer 1

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A machine is a device which is capable of doing useful work. For example:- lathe machine, milling machine, printing machine etc. Mechanical advantage:- it is the ratio of the load lifted to the effort applied it is denoted by M.A.

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Answer 2

Wheel is imp:for The wheel is clearly an important early machine, such as the chariot. A wheel uses the law of the lever to reduce the force needed to overcome friction when pulling a load. Dear Mark as brainlest plz