A block of mass m rests on an inclined plane and is attached by a string to the wall as shown in the figure. The coefficient of static friction between the plane and the block is 0.25. The string can withstand a maximum force of 20 N. The maximum value of the mass (m) for which the string will not break and the block will be in static equilibrium is kg.

International Edition---engineering Mechanics: Statics, 4th Edition
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Chapter7: Dry Friction
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A block of mass m rests on an inclined plane and
is attached by a string to the wall as shown in the
figure. The coefficient of static friction between
the plane and the block is 0.25. The string can
withstand a maximum force of 20 N. The maximum
value of the mass (m) for which the string will not
break and the block will be in static equilibrium is
kg.
Take cos 0 = 0.8 and sin 0 = 0.6.
Acceleration due to gravity g = 10 m/s2
%3D
Transcribed Image Text:A block of mass m rests on an inclined plane and is attached by a string to the wall as shown in the figure. The coefficient of static friction between the plane and the block is 0.25. The string can withstand a maximum force of 20 N. The maximum value of the mass (m) for which the string will not break and the block will be in static equilibrium is kg. Take cos 0 = 0.8 and sin 0 = 0.6. Acceleration due to gravity g = 10 m/s2 %3D
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