Calculating Tension Needed to Lift 1400 kg Car

[mortho]

Homework Statement

How much tension must a rope withstand if it is used to accelerate a 1400 kg car vertically upward at 0.50 m/s2?

Homework Equations

Fg=mg F=ma

The Attempt at a Solution

So far i know Fg=13720 and the Fnet is 700 so I'm not sure but do i subtract 700 from 13720?

 

[Mindscrape]

Would it make sense, physically, if the tension force were less than the gravitational force, as you are saying?