Recent content by blitzzz

Umm, i understand x is the vertical displacement of the seat from its equilibrium position, but wot is a?

I was given Damping coeeficient = 355 ,mass of seat = 40kg, mass of man = 60kg and spring constant = 19620. Would my equation of motion be 40x'' = -355x' - 19620x + 60*9.81 (inclusive of the man's weight)? This problem would be relatively easy but the addition of the man sitting down and...

Hmm but do i calculate the natural frequency using the spring stiffness or the damping coefficient, C? In the case of spring stiffness, natural freq, w = squareroot(K/m) In the case of damping coefficient, natural freq, w = C/2*m*damping factor, I assume its not the latter since I'm not given...

Okay..i'm still lost. Do i need to find out the natural frequency of the system?

Hi. I'm working with a spring-mass-damper-system problem but the thing is.. i can't figure out whether it is a single degree of freedom system(SDOF) or multi-degree of freedom system(MDOF). The question begins with a seat that is supported by a spring and also a damper. A man of 60 kg then...