Lec Rana Hashim Home Work H.W(1) Blocks A.B and C have weights of 50N.25N and 15N respectively. Determine the smallest horizontal force P that will cause impending motion. The coefficient of static friction between A and B is p=0.3, between B and C is p-0.4, and between block C and the ground is p-0.35.(Ans: P-45N) C ground

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.