Your homework is to find out how long it takes the pencil to fall over if the tip can slide along the table. Assume a coefficient of kinetic friction between the tip and the table with a value of 0.4.

The tip of the Apple Pencil can be removed by unscrewing it from the main body of the Pencil. You can buy four-packs of Apple Pencil tips for $19 from Apple, but there are also third-party tip ...