This Is really simple I just can't remember what way Sin and Cosine go(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Here is the problem:

7 (b) A uniform ladder rests on rough

horizontal ground and leans against

a smooth vertical wall.

The length of the ladder is 5 m and

its weight is 80 N.

The angle between the ladder and the

ground is 60

The ladder is on the point of slipping.

(i) Show on a diagram all the forces acting on the ladder.

(ii) Calculate the value of the coefficient of friction

right so I realize the weight acts through the center of gravity in this case half way up. but it also acts towards the wall. is it the sin or cos of the angle that acts down. which goes horizontaly? I know how to do the rest just what way do the components of the weight break up? Is it 80 cos(60 or 80 Sin(60 to find the force acting to the right ?

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Statics, ladder leaning against wall finding friction mass etc. really simple q.

**Physics Forums | Science Articles, Homework Help, Discussion**