- #1

ReidMerrill

- 68

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Thread moved from the technical forums, so no Homework Template is shown

Suppose a spring with spring constant 6N/m is horizontal and has one end attached to the wall and the other end attached to a 3 kg mass. Suppose the friction/damping constant is 1 N s/m

Set up a differential equation that describes this system with x denoting displacement of the mass from equilibrium position and give your answer in terms of x,x', and x''. Assume that positive displacement means the mass is farther from the wall than equalibrium

I'm not sure what to do here. I'm guessing I'll need the equation

mx'' + bx' + kx = F Where mx'' = Fdamping + F spring + F inertia b is damping coefficient: 1 N m/s k is spring coefficient: 6 N/m

Where do I get m? Fdamping is 1 and Fspring is 6 right? Would I get Finertia from F=ma? Because a is not given.

Set up a differential equation that describes this system with x denoting displacement of the mass from equilibrium position and give your answer in terms of x,x', and x''. Assume that positive displacement means the mass is farther from the wall than equalibrium

I'm not sure what to do here. I'm guessing I'll need the equation

mx'' + bx' + kx = F Where mx'' = Fdamping + F spring + F inertia b is damping coefficient: 1 N m/s k is spring coefficient: 6 N/m

Where do I get m? Fdamping is 1 and Fspring is 6 right? Would I get Finertia from F=ma? Because a is not given.