Question

A pagej to your private dropbox by 11:59 pm (12/13). 1. Haley the firefighter (800 N) stands on a 10.0-m long ladder (200 N) that leans against a smooth vertical wall. The ladder makes an angle of 50° with respect to the horizontal ground. Haley stands 5.0 m up from the bottom of the ladder (not vertically from the ground). Determine the magnitude and direction of the forces on the ladder by the wall and the ground. Hint: Neglect the force of friction on the ladder by the wall. In other words, assume the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it.

Answer 1

briven, Weight of fire fighter Haley (WH) = 800N " " Ladder (WL) = 200N o=500, l=lom wall N24 sino WH ground of 1 To find: Ni: Normal force on Ladder by ground Na: Normal force on ladder by wall f: frictional force by ground Take to save of forces about point 'o' to find No: Na XX sino = (WH + WL) toso No - (8004 200) x cos(500) 2 Sin (500) [N2 = 419.5 NI Ang

And I use E Frestical = 0 Ni= WL & WH N 200N & 8oo N INI = 1000 NAM Use Ef horizontal =0 If=419.5N Jang