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[4-10" A strip of wood of mass "M" and l...

[4-10" A strip of wood of mass "M" and length "l" is placed on a "],[" smooth horizontal surface.An insect of mass "m" starts at one "],[" end of the strip and walks to the other end in time "t" ,moving with "],[" a constant speed: "],[" (A) The speed of the insect as seen from the ground is "<(l)/(t)],[" (B) The speed of the strip as seen from the ground is "],[qquad (l)/(t)((M)/(M+m))]

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