Final answer:
The range of weights for which the 102-lb block is in equilibrium is from 0 lb to 102 lb.
Step-by-step explanation:
In order for the 102-lb block to be in equilibrium, the net force acting on it must be zero. This means that the weight of the block must be balanced by an equal and opposite force. So, the range of weights for which the block will be in equilibrium is from 0 lb to 102 lb.