Consider the two wood pieces that are connected by a velcro as indicated below. The block is subjected to a tension force P and has dimensions b 2 in and h = 4 in. The velcro can sustain the maximum normal stress Om-1 psi and the maximum shear stress Tn-7 psi. Use α = 20°. What is the maximum value of the force P that can be applied to the block before the velcro breaks connection?

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)