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A carpenter uses a hammer to strike a nail. Approximate the hammer's weight of 1.8lbs, as being concentrated at the head, and assume that at impact the head is traveling in the -j direction. If the hammer contacts the nail at 50mph and the impact occurs over 0.023 seconds, what is the magnitude of the average force exerted by the nail of the hammer?
A 3400-lb car is traveling in third gear (ratio 2.5 to 1) on a level road at its top speed of 130 mi/h. The air density is 0.00206 slugs/cuft. The car has frontal area of 19.8 sqft, a drag coefficient of 0.28, a wheel radius of 12.6 inches, a driv..
Determine a set of a rectangular beam design values b,d and As that will be needed to support a factored bending moment Mu= 450 Kip-ft. Use f'c= 4500 psi and fy= 40000 psi.
A water pipeline system is made up of three links in parallel. In any given year, on average, 99 in 100 pumps do not fail. The conditions in the links are statistically independent of each other.
The member is 24ft long with pinned end supports and is laterally supported in the weak direction at the one-third points of the total column length. Use 50 ksi steel.
Determine how many years from now the consumption will reach its design capacity with current usage rates if the community has a declining growth rate.
Collars A and B are connected by a 25 in long wire and can slide freely on frictionless rods. If a 60 lb force Q is applied to B. determine tension in wire when (black) x = 9 in and b) corresponding mag of force P required to maintain equilibrium ..
diameter spaced longitunally every 6 in. Knowing that the average allowable shearing stress in the bolts is 10.5 ksi, determine the largest allowable vertical shear in the beam.
knowing that the coefficient of static friction between the collar and the rod is .35, determine the range of values of p for which equilibrium is maintained when 0=50deg and M=20Nm
a police officer stops a speeding driver on saturday nigt and gives hima breathalzer test. the test shows that his estimated blood alcohol content is above .08 g/dl, and this is considered evidence of driving while intoxicated
What is the risk of constructing a harbor which will be unprotected from wave attack during its construction.
Determine the force in member AB Determine the force in member AE Determine the force in member BC Determine the force in member BE Determine the force in member CD
Consider a steel (iron) with 0.2 wt% C. Describe the changes in phases and its structure as it is heated under equilibrium conditions to 850 (deg C).
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