I call this the plus direction, so for object number two m2a I have m2 g minus T equals m2 times a.

对于物体二，以向下为正方向,有m2g-T等于。

youdao

I call this the plus direction, so for object number two m2a I have m2 g minus T equals m2 times a.

对于物体二，以向下为正方向,有m2g-T等于。

youdao