draw a circle.make 8 points on its boundary.join 2 points at a time to get diameters.(a)name all the line segments and all angles obtained.(b) colour all parts(known as sectors)with different colour.(c) measure all 8 angles and find their sum.identify the supplementary amd complementary angle
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The causes of friction are molecular adhesion, surface roughness and the ploughing effect it is called Contact force. It is offered by . solids, liquids as well as by gases but it is maximum in the case of solids and least in the case of gases Every object has a rough surface, though the surface may appear to be smooth to the naked eye. But when we observe through a microscope, we find that the surfaces of all the objects have rough edges. Some of the particles on the surface of objects are in the form of tiny hills and valleys. When a body is pulled over another, these tiny hills and valleys present on both the surfaces in contact get e ntangled with one ❖ another.
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