- #1
member 392791
I don't understand conceptually how something accelerating down weighs less. For example, the elevator example of course if you have something with a string and a weight and the acceleration of the elevator increases upward as positive, you get
T - mg - ma = 0
and for acceleration down, you get
T - mg + ma = 0
This to me doesn't make sense, because shouldn't the equations be switched around because ma is + going up and - going down??
T - mg - ma = 0
and for acceleration down, you get
T - mg + ma = 0
This to me doesn't make sense, because shouldn't the equations be switched around because ma is + going up and - going down??
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