your school started "yoga class" for class 7,8,9 in the last period daily . our district collector inagruated the first yoga class and spoke about the importance of yoga in our life . head master also spoke . write a letter tl your friend in vijayawada giving details of the yoga class .
please say fast
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Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact
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