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- Q. 5: Prove that kg. m/sec = Ns.A dog of mass Md is standing on a raft so that he is a distance Xdgi=L from the shore.A thin 1.5-mm coating of glycerine has been placed between two microscope slides of width 1.0 cm and length 4.0 cm. Find the force required to pull one of the microscope slides at a constant speed of 0.30 m/s relative to the other slide.