Agr ksi ko Dr Q.K.Ghori, “Introduction to Mechanics”, West Pak Publishing CO, Lahore, 1971. ki book pr torha bht abur hasil h, to kia wo mjy itdunya.com py smja skta h. Mjy jis question my msla hoga, wo yha post krta jaw ga. or mera helper image uload krky smjay.
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