# Force Elevator Problem!

by whoopie88
Tags: elevator, force
 P: 52 1. The problem statement, all variables and given/known data Your mass is 65 kg. You stand on a bathroom scale in an elevator on Earth. (a) What force would the scale exert when the elevator moves up at a constant speed? (b) What force would the scale exert when it slows at 2.1 m/s2 while moving upward? (c) What force would the scale exert when it speeds up at 2.1 m/s2 wile moving downward? (d) What force would the scale exert when it moves downward at a constant speed? (e) What force would the scale exert when it slows to a stop at a constant magnitude of acceleration? 2. Relevant equations f=ma fg=mg fnet=mAnet Ff=μῦFn 3. The attempt at a solution I honestly have no idea what to do with all these Y forces going everywhere..Can someone walk me through the process of solving this problem? THANK YOU IN ADVANCE FOR ANY HELP!!
 PF Patron HW Helper Sci Advisor P: 5,802 Draw free body diagrams. There are 2 forces acting on the person, the person's weight, acting down, and the normal (scale) force acting up. Use Newton's laws F_net = ma when accelerating. At constant speeed or at rest, F_net =0 (no acceleration, per newton 1). Please show an attempt .
 P: 52 I found (a), (c), and (d), but I can't find (b). Here is my attempt at solving it: mAnet = -Fn + Fg mAnet - Fg = -Fn 65(-2.1) - 65(9.81) = -Fn 774.15 = Fn Help?
P: 52

## Force Elevator Problem!

I also don't understand how to find (e)..
 P: 52 Okay after working on this, I've solved it. Thanks anyways!

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