[PHY]PHY野....急急急急.

A launcher mechanism consists of two rubber bands with uniform spring constant k and equilibrium length L as in the diagram. Assume the launcher is held horizontally and the surface is frictionless.

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佢係一個打橫冒T字..2只角用spring拉住....




a) Find the potential energy of the rubber bands at any position x. Assume that the potential energy is zero when the rubber bands aren’t stretched.

b) A mass (150. g) is loaded into the launcher and released when x = 50.0 cm. Calculate the maximum speed of the mass. (k = 1400. N/m, L = 25.0