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Assume that the force exerted on the head of the nail being plucked out by the hammer is vertical, and neglect the hammer's weight.
a. Draw the free-body diagram of the hammer.
b. If F =10 N, what are the magnitudes of the forces exerted on the nail by the hammer and the reaction forces exerted on the floor by the hammer?
Suggest why it is important to make a distinction between developing the user requirements and developing system requirements in the requirements engineering process.
an electric motor powered blower is used to accelerate quiescent air 0 ms to a velocity of 10 ms at a volume flow rate
air enters a compressor operating at steady state with a volumetric flow rate of 8 m3min at 23degc and 0.12 mpa. the
(a) derive an expression for the net work transfer for the cycle. Prove that for a Stirling Cycle, the net work transfer is always from the system to the surroundings.
a dragster comes off the start line with an acceleration of 4 ms2. the acceleration increases uniformly from 4 ms2 to
the space between two horizontal parallel flat plates 0.5 cm apart is filled with oil of viscosity ?micro 0.05 kgm.s.
consider an alcohol and a mercury thermometer that read exactly 0 c at the ice point and 100 c at the steam point. the
a secondary settling tank is to be designed for a municipal wastewater treatment facility. the influent tss is 1000 mgl
A round cantilever bar is loaded. Given diameter d = 50mm, T = 0.1P N.m, F = 10P N. Allowable stresses are 100 MPa in tension and 60 MPa in shear on a section at a = 120 mm from the free end. Determine largest P.
the link DE is 3mm thick and 25 mm width,determine the normal stress in the central portion of the link.
water in a pistoncylinder arrangement b is connected to a 1 m3 tank a by a line and valve. initially at state 1 the
Calculate the torque on each of the two shafts,the power transmitted and the power lost in friction. U=0.3 what is the efficiency of the drive.
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