Consider Lagrangian functions L(q, q,t˙)andL (q, q,t˙)=L(q, q,t˙)+dF(q, t) dt. Compare the Lagrangian equationsinbothcases.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this