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## 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.