Recent content by Chrisemo

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Hi, I'm very confused about one question in my homework, that is due today. I appreciate any help.Thank you very much. 1. Homework Statement The motion of a particle is given by: x = (6.0m) cos(0.586t + 0.72) Find the phase at time t=1.38s 2. Homework Equations Simple harmonic motion The...

Thank you very much :)

If the only weight added is the boy's I think it will be Kx=mg so,K=(80x9.82)/4.0x10^-3=1.96x10^5

Ok, so F= - Kx = mg, but which mass do I use? Car+boy or only boy?

So, what can I use to calculate the spring constant,can I use the sum of the forces normal and mg of the boy? -N+mg=-Kx

Hi, I hope somebody can help me.I'm stuck in this problem..I want to make sure I made it right before sending to the teacher.Thank you very much 1. Homework Statement An 80.0 kg student sits down in his 920 kg car, and his weight causes the causes the car's springs to sink an additional 4.0 x...