No you can use what you found out in the last worksheet.
How hard does Sam have to pull, when Alex wants to stay at the same hight? Write your result in the Textbox an press Return. Then press "Start" to find out if you are right! Hints: [list] [*]What direction does [color=#d69210][math]\vec F_1[/math][/color] have? [*]How could you calculate the lenght of [color=#d69210][math]\vec F_1[/math][/color] (with a vector in direction of [color=#d69210][math]\vec F_1[/math][/color] und the vector [color=#c51414][math]\vec F_g[/math][/color])? [*]How long does [color=#d69210][math]\vec F_3[/math][/color] have to be when Alex wants to stay at the same hight? [/list]