Answer to Question #116067 in Mechanics | Relativity for Sania

Question #116067
A pendulum is raised 0.7m above the floor, is released and then swings freely. Neglecting all frictional forces, what is the velocity of the pendulum when it is 0.25 m above the floor?
1
Expert's answer
2020-05-15T16:22:56-0400

According to law of conservation of energy, the potential energy between 0.7 and 0.25 m converted to the kinetic energy:


"mg(H-h)=\\frac{1}{2}mv^2,\\\\\n\\space\\\\\nv=\\sqrt{2g(H-h)}=2.97\\text{ m\/s}."

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