5.71 bathroom scale

Was anyone able to correctly find the answer to this problem?

As far as I know, mass (in kg) doesn't change regardless of acceleration.

4.58 "Helicopter Problem"

Does anyone know how to do this problem?

I tried it and I got 16819i, 0j, -3364k (all in Newtons) but says wrong

I thought it might be because of sig figs, so i tried 17000i, 0j, -3400k still wrong :/

I used m= 28032kg from the 2.75E5 N

Did someone who got this correct use the Newtons as mass and get it correct? or did you convert the Newtons to kg first, and then use as mass?

Blocks in an elevator ranking task

Anyone get part b?

I don't know if any of you guys have trouble with copying the data.

(Or may be it's just me for using Chrome)

Anyways, you can copy this and paste in Excel :)

When copying, copy the whole post and past it to Word to get the table.

I don't know exactly why, but I get only list of numbers if I try to copy only the table.

t(S)	x(m)
0	0.074938
0.0333	0.419382
0.0667	0.80187
0.1	1.270251
0.1333	1.623772
0.1667	1.847934
0.2	2.220177
0.2333	2.387535
0.2667	2.794794
0.3	2.947321
0.3333	3.29177
0.3667	3.484816
0.4	3.691514
0.4333	3.752497
0.4667	3.996829
0.5	4.095795
0.5333	4.22594
0.5667	4.287084
0.6	4.497307
0.6333	4.447558
0.6667	4.533474
0.7	4.62196
0.7333	4.662088
0.7667	4.629701
0.8	4.676954
0.8333	4.500983
0.8667	4.525649
0.9	4.494198
0.9333	4.352884
0.9667	4.151631
1	4.148494
1.0333	3.999395
1.0667	3.802416