3. he box is stationary on the inclined surface. The coefficient of static friction between the box and the surface is µs. (a)lf the mass of the box is 10 kg, a = 20°, ß = 30°, and µs = %3D 0.24, what force T is necessary to start the box sliding up the surface? (b)Show that the force T necessary to start the box sliding up the surface is a minimum when tan B = µs.
3. he box is stationary on the inclined surface. The coefficient of static friction between the box and the surface is µs. (a)lf the mass of the box is 10 kg, a = 20°, ß = 30°, and µs = %3D 0.24, what force T is necessary to start the box sliding up the surface? (b)Show that the force T necessary to start the box sliding up the surface is a minimum when tan B = µs.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:3. he box is stationary on the inclined surface. The
coefficient of static friction between the box and the
surface is µs.
(a)lf the mass of the box is 10 kg, a = 20°, ß = 30°, and µs =
%3D
0.24, what force T is necessary to start the box sliding up
the surface?
(b)Show that the force T necessary to start the box sliding
up the surface is a minimum when tan B = µs.
T
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