Components of the net force in newtons
A 0.15 kg particle moves along an x axis according x(t) = -13 + 2t + 4t2 - 3t3, with x in meters and t in seconds. Give an expression for the (a) x, (b) y and (c) z components of the net force (in Newtons) at time t.
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The roof will be a poured concrete slab, 4in thick. The design live load on the roof is 200lb/ft^2. Specify a suitable wide flange beam that will limit the stress in the beam to 22000 psi.
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