Calculate the workdone to stretch an elastic string by 40cm if a force of 10 newton produces an extension of 4cm in it

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

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the components of a vector are the parts of the vectors that are to each other.

b perpendicular