You might have observed on a dry day that when you touch the screen of a television or computer you get a slight shock. why does this happen?

Explanation:

When we touch the screen of a television or computer we get a slight shock on a dry day. It is due to the accumulation of the electric charges on the screen.

We get slight shock due to the electrostatic force between the hair on the skin and the screen of the television.  When we touch the screen then the charges discharge through our body.  

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.