SSM In Fig 12-63, a rectangular slab of slate rests on a bedrock surface inclined at angle θ = 26°. The slab has length L = 43 m, thickness T = 2.5 m, and width W = 12 m, and 1.0 cm 3 of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is 0.39. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are shown). If each bolt has a cross-sectional area of 6.4 cm 2 and will snap under a shearing stress of 3.6 × 10 8 N/m 2 . what is the minimum number of bolts needed? Assume that the bolts do not affect the normal force. Figure 12-63 Problem 53.
SSM In Fig 12-63, a rectangular slab of slate rests on a bedrock surface inclined at angle θ = 26°. The slab has length L = 43 m, thickness T = 2.5 m, and width W = 12 m, and 1.0 cm 3 of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is 0.39. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are shown). If each bolt has a cross-sectional area of 6.4 cm 2 and will snap under a shearing stress of 3.6 × 10 8 N/m 2 . what is the minimum number of bolts needed? Assume that the bolts do not affect the normal force. Figure 12-63 Problem 53.
SSMIn Fig 12-63, a rectangular slab of slate rests on a bedrock surface inclined at angle θ = 26°. The slab has length L = 43 m, thickness T = 2.5 m, and width W = 12 m, and 1.0 cm3 of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is 0.39. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are shown). If each bolt has a cross-sectional area of 6.4 cm2 and will snap under a shearing stress of 3.6 × 108 N/m2. what is the minimum number of bolts needed? Assume that the bolts do not affect the normal force.
a 10 kg sphere is supported on a frictionless plane inclined at angle u = 45° from the horizontal. Angle f is 25°. Calculate the tension in the cable.
The coefficient of static friction between a block of mass
m and an incline is = 0•3. (a) What can be the
maximum angle e of the incline with the horizontal so
that the block does not slip on the plane ? (b) If the incline
makes an angle 8/2 with the horizontal, find the
frictional force on the block.
57. ssm A worker stands still on a roof sloped at an angle of 36° above
the horizontal. He is prevented from slipping by a static frictional force
of 390 N. Find the mass of the worker.
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.