Cranes, such as this one that is removing the crane that was involved in the brick refacing of krannert center, are comprised of truss-like structures to achive high strength and low weight. let us model the illustrated crane boom as a planar truss that is subjected to the tension load t t. given the following: t = t=700 kn l = 2 l=2 m θ = 5 o θ=5o α = 20 o α=20o determine force f a b fab in kn in the blue member a b ab¯. matlab input: t = 700; l = 2; theta = 5; alpha = 20;

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?