Topic 3

In a production line, 10,000 small screws are to be sorted into packs of 50 each. Manual counting would be too tedious. Suggest ways in which the sorting may be done quickly.

Solution 1: Adjust the resistance of the electromagnet such that it will attract 50 screws .But this cannot be done as we cannot exactly adjust the resistance level of the screws . If we just adjust it to a specific resistance level , it will either attract all or none of the screws .

Solution 2: Count 50 screws and place them on a weighing scale. Record the weight down. Take a pile of screws and place them on the weighing scale. Take away or add screws to get the weight of the previous 50 screws.