Coefficient of Friction - Harder Problems (AQA A-Level Mathematics): Quizzes

$F_{\text{friction}} \leq \mu_s F_{\text{normal}}$

$F_{\text{friction}} = \mu_k F_{\text{normal}}$

$mg \sin(\theta)$

$\mu \approx 0.3640$

Approximately 82.24 N

$P \cos 20°$

When other forces act at angles

When object is on the verge of moving

$R = P \sin 20° + 10g \cos 20°$

Newton's second law: $F = ma$