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10 questions from this quiz
Ffriction≤μsFnormalF_{\text{friction}} \leq \mu_s F_{\text{normal}}Ffriction≤μsFnormal
Ffriction=μkFnormalF_{\text{friction}} = \mu_k F_{\text{normal}}Ffriction=μkFnormal
mgsin(θ)mg \sin(\theta)mgsin(θ)
μ≈0.3640\mu \approx 0.3640μ≈0.3640
Approximately 82.24 N
Pcos20°P \cos 20°Pcos20°
When other forces act at angles
When object is on the verge of moving
R=Psin20°+10gcos20°R = P \sin 20° + 10g \cos 20°R=Psin20°+10gcos20°
Newton's second law: F=maF = maF=ma
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