Moments (Edexcel A-Level Mathematics): Flashcards

The ladder $AB$ makes an angle of $70°$ with the horizontal.

The ladder has a length of 8 m.

Surface roughness and normal force affect friction at B.

$R_W = 60$ N, normal reaction at $A$ equals $60$ N.

Use $\text{weight} = \text{mass} \times \text{gravity}$; solve for mass.

The uniform rod has a weight of 20 N.

The length of the rod $AB$ is $3$ m.

Point C is 1 m directly above point A.

$\theta \approx 18.435°$ using $\tan(\theta) = 1/3$.

$T = mg +$ additional forces acting upwards.