1.

1. Force on the block by upper spring.(a) Mgb) MaA1(c) Mg Ke(d) Ma K1K1K2K1+ K2

Answer»

force balance equation is

mg -k1x = k2x=> x = mg/(k1+k2)

so, force on block by upper spring is k1x = mgk1/(k1+k2)



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