Accepted Answer
Since the bag is not accelerating vertically, we know that all of the vertical forceson it are balanced, that is, they add up to zero.There is a downward force of 20-N on the bag, because of gravity.The upward forces on it must also add up to 20-N.The only upward force on the bag is the tension in the rope.So the tension must be 20-N .
Suggested Answer
Answer: 20 NExplanation: Hope this helps :)