Aplank of length 2l leans against a wall. it starts to slip downward without friction. show that the top of the plank loses contact with the wall when it is at two-thirds of its initial height.

Isuck at math i am no sorry

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.