# Very basic tension question, i don't get the theory

## Homework Statement

a)if an elevator is moving upwards, will the weight force be greater that the tension force in its cable?
b) assume
an elevator of mass 1500kg is accelerating upwards at 2.5ms^(-2) find T. is this greater than the weight force?

F=ma

## The Attempt at a Solution

so, I know the weight force, with the elevator in a free body diagram is
f = ma
f = 1500x-9.8
and i know that if the elevator is acelerating upwards it must have an unbalanced force upwards. since there are only two forces acting, tension, and weight, then the tension must be greater than the weight to be unbalanced.

but, when i try to calculate tension, using f = ma
f = 1500x2.5
this leaves me with a smaller force than the weight force. how does this make sense?
can anyone, just explain the basic ides of tension. i interperate my book to say it acts in two directions, how can one force do that? obviously this question is designed to give people the problem im having! thanks

PhanthomJay