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Convert the masses in g to kg So, 50g=0.05kg & 950g=0.95kg Mass of bullet (Mb)=0.05kg Mass of lead block (mB)=0.95kg Initial vel of bullet (Ub)=200m/s Final vel of bullet (Vb)=0m/s Initial vel of lead block(uB)=0m/s Final vel of lead block(vB)=vB? The