International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN: 9781305501607
Author: Andrew Pytel And Jaan Kiusalaas
Publisher: CENGAGE L
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Chapter 8, Problem 8.106P
To determine
Resultant force and location of its line of action.
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Q1: Determine the length, angle of contact, and width of a 9.75 mm thick
leather belt required to transmit 15 kW from a motor running at 900 r.p.m. The
diameter of the driving pulley of the motor is 300 mm. The driven pulley runs at
300 r.p.m. and the distance between the centers of two pulleys is 3 meters. The
density of the leather is 1000 kg/m³. The maximum allowable stress in the
leather is 2.5 MPa. The coefficient of friction between the leather and pulley is
0.3. Assume open belt drive.
5. A 15 kW and 1200 r.p.m. motor drives a compressor at 300 r.p.m. through a pair of spur gears having
20° stub teeth. The centre to centre distance between the shafts is 400 mm. The motor pinion is made
of forged steel having an allowable static stress as 210 MPa, while the gear is made of cast steel
having allowable static stress as 140 MPa. Assuming that the drive operates 8 to 10 hours per day
under light shock conditions, find from the standpoint of strength,
1. Module; 2. Face width and 3. Number of teeth and pitch circle diameter of each gear.
Check the gears thus designed from the consideration of wear. The surface endurance limit may be
taken as 700 MPa. [Ans. m = 6 mm; b= 60 mm; Tp=24; T=96; Dp = 144mm; DG = 576 mm]
4.
G
A micarta pinion rotating at 1200 r.p.m. is to transmit 1 kW to a cast iron gear at a speed of 192 r.p.m.
Assuming a starting overload of 20% and using 20° full depth involute teeth, determine the module,
number of teeth on the pinion and gear and face width. Take allowable static strength for micarta as 40
MPa and for cast iron as 53 MPa. Check the pair in wear.
Chapter 8 Solutions
International Edition---engineering Mechanics: Statics, 4th Edition
Ch. 8 - Use integration to determine the coordinates of...Ch. 8 - Use integration to determine the coordinates of...Ch. 8 - Use integration to determine the coordinates of...Ch. 8 - Use integration to determine the coordinates of...Ch. 8 - Use integration to determine the coordinates of...Ch. 8 - Use integration to determine the coordinates of...Ch. 8 - Using integration, locate the centroid of the area...Ch. 8 - Determine the y-coordinate of the centroid of the...Ch. 8 - Determine the y-coordinate 0f the centroid of the...Ch. 8 - Use integration to locate the centroid of the...
Ch. 8 - Locate the centroid of the parabola by...Ch. 8 - Use integration to locate the centroid of the...Ch. 8 - The parametric equations of the plane curve known...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - Use the method of composite areas to calculate the...Ch. 8 - The plane region is bounded by a semicircle of...Ch. 8 - The centroid of the plane region shown is at C....Ch. 8 - Compute the centroidal coordinates of the L-shaped...Ch. 8 - Find the centroidal coordinates of the plane...Ch. 8 - Using the method of composite areas, find the...Ch. 8 - Given that the centroid of the plane region is at...Ch. 8 - Using the method of composite curves, locate the...Ch. 8 - Using the method of composite curves, locate the...Ch. 8 - Using the method of composite curves, locate the...Ch. 8 - Using the method of composite curves, locate the...Ch. 8 - Using the method of composite curves, locate the...Ch. 8 - Using the method of composite curves, locate the...Ch. 8 - Determine the ratio a/b for which the centroid of...Ch. 8 - Use numerical integration to locate the centroid...Ch. 8 - Determine the centroidal coordinates of the plane...Ch. 8 - Compute the centroidal y-coordinate of the plane...Ch. 8 - The equation of the catenary shown is y = 100 cosh...Ch. 8 - Use integration to locate the centroid of the...Ch. 8 - By integration, find the centroid of the surface...Ch. 8 - Locate the centroid of the volume obtained by...Ch. 8 - Solve Prob. 8.41 assuming that the triangle is...Ch. 8 - Use integration to find the centroidal coordinates...Ch. 8 - Solve Prob. 8.43 assuming that the area is...Ch. 8 - Verify the centroidal z-coordinate of the pyramid...Ch. 8 - Use integration to compute the z-coordinate of the...Ch. 8 - Determine the centroidal z-coordinate of the...Ch. 8 - Prob. 8.48PCh. 8 - Locate the centroid of the volume between the...Ch. 8 - Prob. 8.50PCh. 8 - Prob. 8.51PCh. 8 - By the method of composite volumes, determine the...Ch. 8 - By the method of composite volumes, determine the...Ch. 8 - By the method of composite volumes, determine the...Ch. 8 - By the method of composite volumes, determine the...Ch. 8 - By the method of composite volumes, determine the...Ch. 8 - By the method of composite volumes, determine the...Ch. 8 - Use the method of composite volumes to determine...Ch. 8 - The cylindrical container will have maximum...Ch. 8 - Using the method of composite surfaces, locate the...Ch. 8 - Using the method of composite surfaces, locate the...Ch. 8 - Using the method of composite surfaces, locate the...Ch. 8 - Using the method of composite surfaces, locate the...Ch. 8 - Using the method of composite surfaces, locate the...Ch. 8 - Using the method of composite surfaces, locate the...Ch. 8 - The picture board and its triangular supporting...Ch. 8 - By the method of composite curves, locate the...Ch. 8 - By the method of composite curves, locate the...Ch. 8 - By the method of composite curves, locate the...Ch. 8 - Use numerical integration to find the centroid of...Ch. 8 - Prob. 8.71PCh. 8 - Locate the centroid of the volume generated by...Ch. 8 - Prob. 8.73PCh. 8 - Prob. 8.74PCh. 8 - Prob. 8.75PCh. 8 - A 6-in. diameter hole is drilled in the conical...Ch. 8 - A torus is formed by rotating the circle about the...Ch. 8 - A solid of revolution is formed by rotating the...Ch. 8 - Compute the volume of the spherical cap that is...Ch. 8 - Calculate the surface area of the truncated sphere...Ch. 8 - The rim of a steel V-belt pulley is formed by...Ch. 8 - Determine the volume of the machine part shown.Ch. 8 - A solid is generated by rotating the plane area...Ch. 8 - Prob. 8.84PCh. 8 - Find the surface area of the 90 duct elbow.Ch. 8 - Determine the volume of the concrete arch dam.Ch. 8 - (a) Find the volume of liquid contained in the...Ch. 8 - Compute the surface area of the axi-symmetric...Ch. 8 - The steel cylinder with a cylindrical hole is...Ch. 8 - The hemispherical glass bowl is filled with water....Ch. 8 - What is the ratio L/R for which the uniform wire...Ch. 8 - Small screws are used to fasten a piece of...Ch. 8 - Prob. 8.93PCh. 8 - 3.94 The aluminum cylinder is attached to the...Ch. 8 - Prob. 8.95PCh. 8 - Prob. 8.96PCh. 8 - Prob. 8.97PCh. 8 - Locate the center of gravity of the hammer if the...Ch. 8 - Prob. 8.99PCh. 8 - The cylindrical water tank with R = 10 ft and H =...Ch. 8 - Prob. 8.101PCh. 8 - Five 34-in. diameter holes are to be drilled in a...Ch. 8 - Wind pressure acting on a cylinder can be...Ch. 8 - Prob. 8.104PCh. 8 - The pressure acting on the square plate varies as...Ch. 8 - Prob. 8.106PCh. 8 - Prob. 8.107PCh. 8 - If the intensity of the line loading is...Ch. 8 - Prob. 8.109PCh. 8 - The intensity of the line loading acting on a...Ch. 8 - Determine the resultant force or resultant couple...Ch. 8 - The inside surface of each thin shell carries a...Ch. 8 - Calculate the resultant force caused by the water...Ch. 8 - Determine the resultant force acting on the elbow...Ch. 8 - Determine the smallest distance I) that would...Ch. 8 - Each of the three gates has a constant width 1:...Ch. 8 - The concrete dam shown in cross section holds back...Ch. 8 - A concrete seawater dam is shown in cross section....Ch. 8 - Determine the force F required to pull up the...Ch. 8 - The normal pressure acting on the triangular plate...Ch. 8 - One side of the container has a 03-m square door...Ch. 8 - The 12-ft wide quarter-circular gate AB is hinged...Ch. 8 - The center of gravity of the plane wire figure is...Ch. 8 - The 10-m wide gate restrains water at a depth of 6...Ch. 8 - Find the resultant of the line load shown.Ch. 8 - Prob. 8.126RPCh. 8 - Determine the centroidal coordinates of the volume...Ch. 8 - Prob. 8.128RPCh. 8 - Prob. 8.129RPCh. 8 - Prob. 8.130RPCh. 8 - Using the method of composite areas, find the...Ch. 8 - Find the centroid of the truncated parabolic...Ch. 8 - Prob. 8.133RPCh. 8 - A solid of revolution is formed by rotating the...Ch. 8 - Two hemispherical shells of inner diameter 1 m are...Ch. 8 - Calculate the area of the surface generated when...Ch. 8 - Determine the resultant of the line loading, given...Ch. 8 - Determine the centroidal coordinates of the plane...Ch. 8 - The sheet metal trough has a uniform wall...Ch. 8 - The trough is filled with water (=62.4lb/ft3)....Ch. 8 - The thin-walled cylindrical can with a spherical...Ch. 8 - Find the location of the centroid of the shaded...
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