Recent content by cdx

The mass of the elevator is 520 kg. Sorry I forgot to include this. Correct me here: There are two forces acting on the elevator, FG and FN. FG = mg = 520 kg * (-10) = -5200N. Help?

Homework Statement If the maximum tension that a cable can safely withstand is 9000N and the maximum upward acceleration of the elevator is 1.00 ms2, how many 80kg passengers may be safely carried in the elevator? (The mass of the cable is negligible) Homework Equations F=ma T=mg...

Yes, C2 = -10 in my calculation as well and substituting -10 back into v(t) = 2(C2)t + C1, I get v(t) = -20t + C1. How do I find C1 so that I can substitute -2 for t to solve for v(t)? Or is my answer for the velocity of the particle at time t = -2s simply v(-2) = 40 + C1 m/s? If I don't have...

Homework Statement (I can't seem to get the super and subscripts to work so I apologize if this looks ugly.) The position of a particle moving along the x-axis is given at time t by: x = C0 + C1t + C2t^2. At time t = 4.0s the acceleration of the object is a = -20 m/s^2 and that the object...