7. A mass of 1 kg attached to a spring with a spring constant of 100 Nt/m oscillates horizontally on a smooth frictionless table with amplitude of 0.5 m. When the mass is 0.25 m away from equilibrium, determine the total mechanical energy.
(A) 3.125 J,
(B)9.375 J,
(C) 12.5 j,
(D) 15.625 J.
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統計: 尚無統計資料
統計: 尚無統計資料