When an elevator moves upwards with an acceleration

  • #1

Homework Statement



When an elevator moves upwards with an acceleration, what is the equation for tension?

Is it T+W =ma?

When an elevator moves downwards with an acceleration, would the equation be

T+W=-ma?

Thats all. Thanks.

I really can't figure it out. All I know is that the equations T-mg=ma (for upwards) and T-mg=-ma (downwards) are wrong.



Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
SammyS
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Draw a Free Body Diagram for each case. Use Fnet=ma .
 
  • #3


N = mg + ma if the elevator has an upward acceleration
N = mg - ma if the elevator has a downward acceleration

Would tension be the same as normal force in this situation?
 
  • #4
SammyS
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For this problem, what is the normal force being used for?

Draw a Free Body Diagram for each case. Use Fnet=ma .
 
  • #5


For this problem, what is the normal force being used for?

Draw a Free Body Diagram for each case. Use Fnet=ma .
I got the problem right. Thanks for your help!
 

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