This problem utilizes most of the important laws introduced

Last updated: 6/19/2023

This problem utilizes most of the important laws introduced so far and it is worth a substantial effort The problem is tricky although not really complicated so don t be alarmed if the solution eludes you A plank of length 2L leans against a wall It starts to slip down ward without friction Show that the top of the plank loses contact with the wall when it is at two thirds of its initial height 2L 0