anonymous
  • anonymous
A 61 g ice cube can slide without friction up and down a 31 ∘ slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 12 cm . The spring constant is 20 N/m . When the ice cube is released, what distance will it travel up the slope before reversing direction?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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IrishBoy123
  • IrishBoy123
for a simple approach, find the equilibrium extension, ie the extension as if were the mass at rest on the spring. oscillation should be symmetrical about that point. more detailed approach: energy of system to start with: \(E_o = \dfrac{1}{2}kx^2 = \dfrac{1}{2}(20)(0.12)^2\) when the cube has moved a distance x up the slope \(E(x) = mg x \sin 31 + \dfrac{1}{2}k(0.12-x)^2 + \dfrac{1}{2}m \dot x^2 = E_o\) \(\dot E(x) = mg \color{red}{\dot x} \sin 31 + 2\dfrac{1}{2}k(0.12-x)(-\color{red}{\dot x}) + 2\dfrac{1}{2}m \color{red}{\dot x} \ddot x = 0\) \(\implies mg \sin 31 - k(0.12-x)+m\ddot x = 0\) tidy up and solve the DE.

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