Video Physics Course
Video Electronics course
Resources for Teachers
Fearofphysics: Physics problem of the week
Physics Problem of the Week for Oct 13 2014
Scale in an Elevator
A 85 kg person is standing on a scale in an elevator. What weight (in Newtons) will the scale read in the following cases.
When the elevator is not moving.
When the elevator is moving up at constant speed of 10 m/s.
When the elevator is moving down at a constant speed of 10 m/s.
When the elevator is moving up at 10 m/s and accelerating up at 2 m/s$^2$.
When the elevator is moving down at 10 m/s and accelerating down at 2 m/s$^2$.
(Hint: As a guide, think of how your feet felt the last time you rode in an elevator.)
Submit your answer
Create an electronic version of your answer, and post it to the web using Google Docs, Dropbox, Imgur, etc.
Generate a "share link" to your answer (be sure the share link allows for public access).
Paste the share link here:
Type just your final answer here:
Correct answers will be posted here when the problem expires (typically every Wednesday, when a new problem will be posted).
Prove you are human
Group solutions work when someone suggests the next step toward this problem's solution.
No steps have been submitted for this problem yet.
to suggest the next step in solving this problem.