Question

why is it difficult to unscrew ajar with an oily hand​

Answer 1

Answer:

When the hands are oily,then the oil acts as a lubricant and reduces the friction . As the frictional force is less,it is difficult to get grip over the lid of the bottle and becomes difficult to open it.

Hope it helps ❤

Answer 2

Answer:

because oily hands are very slippery so,it is very hard to open the jar with oily hands