Block A of Figure 4 weighs 60.0 N. The static friction coefficient between the b

Question

Block A of Figure 4 weighs 60.0 N. The static friction coefficient between the block and the surface where it rests is 0.25. The weight w is 12.0 N and the system is in equilibrium. Calculate the frictional force exerted on Block A. b) Determine the maximum weight w with which the system will remain in equilibrium. El bloque A de la figura 4 pcsa 60.0 N. El coeficiente de friccion estatica entre el bloque y la supertlcie donde descansa es de 0.25. El peso w es de 12.0 N y el sistema esta en equilibrio. Calculc la fuerza de friccion ejercida sobre el bloque A. b) Determine el peso miximo w con el cual el sistema permanccera en equilibrio.

Explanation / Answer

a) at 450, Tsin(450)=Tcos(450)

So Th=Tv=12 N and since system in equilibrium,

f=Tv=12 N

b) n - 60 N = 0 ===========> n = 60 N

F = ms*n=0.25*60 =15 N

Since TV=Th, then maximum weight is 15 N

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