A 140-lb construction worker punched a bamboo wall (the wall has a shearingstrength of 241 MPa). His hand 3 inches in diameter is equivalent to 0.6% of themass of his own body, and forms a circular shape with a compressive stress limitof 0.31 mPa before it bleeds.Find for:а.thickness in cm of the hole he made on the bamboo wallb. force he exerted to punch the wallc. maximum acceleration of his punch without bleeding his hand

Answered: Image /qna-images/answer/474b6b33-3bc8-440d-a119-17560415acba.jpg

Answered: A 140-lb construction worker punched a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

The ram and plunger of a hydraulic press are 150 mm and 25 mm in diameter respectively. With a plunger stroke of 30 cm, the press is able to lift a load of 1 tonnes through 1.5 m in a times of 25 min. Area of the ram O 100 cm2 O 176.7 cm2 O 190 cm2 O 230 cm2
4) This Atwood's machine includes two blocks connected by a cable, going over a pulley without slipping. Block 1 (30.0 kg) is connected to a spring (70.0 N/m), and slides on a horizontal surface with a coefficient of kinetic friction of 0.0100. Block 2 is 50.0 kg, and hangs vertically from the cable. The pulley is a disk with a radius of 0.500 m, and its moment of inertia about the center of mass is 10. 0 kg-m“. a) Draw the three free body diagrams, and write out Newton's 2nd Law for each. b) Derive the equation of motion (inhomogeneous 2nd order ODE) for this system. c) Use u-substitution to rewrite this as a homogeneous 2nd order ODE. d) Assume the position x as a function of time t is of the form x(t) = A cos (wt + p) I disk for undamped natural frequency w, phase angle P, and amplitude A. The initial conditions are: x(0) v(0) = -3. 00 m/s. Solve for the position of the mass as a function of time (you need to solve for w, 4, and A). = 2. 00 m and Mz
Two box hang from the ends of a string suspended from a frictionless pulley. The mass on the left is chosen to create a tension of 4 N in the string. The box on the right has a weight of 2 N. What will be the acceleration of the box on the right? Assume the acceleration of gravity is 9.8 m/s?. 4 N 2 N
In a manufacturing process, a drill press automatically drills a hole into a sheet metal part on a conveyor. In the drilling operation the drill bit starts at rest direcdly above the part, descends quickly, drills a hole, and quickly returns to the start position. The maximum vertical speed of the drill bit is 4 in./s, and while drilling the hole, it must move no more than 2.6 in./s to avoid warping the metal. Let s(t) be the drill biť's height (in inches) above the part as a function of time t in seconds. Sketch possible graphs of the drill bit's velocity [s'(t)] and acceleration [s"(t)].
Q3: The web of a girder of I-section is 45 cm deep and 1 cm thick; the flanges are each 22.5 cm wide by 1.25 cm thick. The girder at some particular section has to withstand a total shearing force of 200 kN. Calculate the shearing stresses at the top and middle of the web. 1.25 cm 1 cm .1.25cm 22.5cm
As information for the mechanic, it is desired to evaluate the variation in shear force along the length of the shaft. Therefore, what is the value of the shear force in the central section of the shaft (125 mm < x < 600 mm)? Options: a) The shear force in the central section of the shaft is 0 kN. B) The shear force in the central section of the shaft is 0.8 kN. c) The shear force in the central section of the shaft is 1.5 kN. d) The shear force in the central section of the shaft is 1.48 kN. e) The shear force in the central section of the shaft is 0.82 kN.
The ram and plunger of a hydraulic press are 150 mm and 25 mm in diameter respectively. With a plunger stroke of 30 cm, the press is able to lift a load of 1 tonnes through 1.5 m in a times of 25 min. Area of the plunger 9.54 cm2 11.21 cm2 4.91 cm2 O 6.82 cm2 O
1. A 50-mm diameter solid shaft, with a length of 1 meter, is supported at one end and free in the other end. Determine the maximum allowable torque for each material if the angle of twist is not to exceed 6º. Remember to consider both the maximum shear stress and the angle of twist. MATERIAL MODULUS OF RIGIDITY MAXIMUM SHEAR STRESS TORQUE Aluminum 26 GPa 207 MPa Steel 79 GPa 75 MPa Titanium 44 GPa 760 MPa
200 mm 1.36 The bell crank, which is in equilibrium under the forces shown in the figure, is supported by a 20-mm-diameter pin at D that is in double shear. Determine (a) the required diameter of the connecting rod AB, given that its tensile working stress is 100 MPa; and (b) the shear stress in the pin. -240 mm- 50 mm 10° 60° FIG. P1.36 30 kN 150 mm- FIG. P1.37 50 mm
Two solid circular shafts are connected through a flange bolt coupling consisting of 3 circular bolt rows. The free ends of the shafts are to be subjected by equal torque. Solid Shafts Diameter (mm) Length (m) Shear Modulus (GPa) Shaft A Shaft B 65 66 3 3.8 81 84.6 Flange-bolt coupling Bolt Circle Diameter (mm) Bolt Alowable Shear Stress (MPa) Bolt Diameter Shear Modulus Number of Bolt Row (mm) (GPa) Bolts 1 95 14 77 35 4 2 116 17 97 42 10 3 135 13 93 49 14 A Calculate the torque capacity of the flange-bolt coupling (kN-m). B. Calculate the stresses in both shaft if the torque capacity is applied at both ends (MPa). C. Calculate the total angle of twist (in degrees).
A drilling riser is used to drill a 4km deep hole into the seabed. The riser can be approximated as a hollow steel shaft of 185mm and 160mm outer and inner diameter respectively. If the power exerted is 230kW and the speed of rotation of the drill is 75RPM, calculate the maximum shear stress in the shaft and the twist of one end relative to the other in degrees.(Note the angle of twist of a 4km drill string is going to be >> 360o ) G = 89 kN/mm2

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS