CIVE 210 Homework 1, Spring 2011

Via | HOMEWORK TL ic : DUE DATE WED HON DAY Eng. & fae fi The specific weight (wt/vol) of brass ; is 520 Ib/#°. Determine its density (mass/vol.) ‘in SI units, appropriate pretix. sing the base units of the SI system, show that Eq. \-j/is a dimensionally homogeneous equation which in newtons. Compute the gravitational force acting between two identical spheres that are touching each other. The mass of each sphere is 150 kg, and the radius is275 mm. EO 2 |. Fa Grit, £2 2- The boat is to be pulled onto the shore using two ropeg If the resultant force is to be 80 lb, directed along eel aa as shown, determine the magnitudes of forces T and P acting in each Tope and the angle 9 of P so that the magnitude of keel as shown. P is a minimum. T acts at 30°-from the 2-29), Three chains act on the bracket such that they creaté a resultant force having a magnitude of 500 Ib. If of the chains are subjected to known forces, as shown, determine the orientation @ of the third chain, measured clockwise from the positive x axis, so that the magnitude of force F in this chain is a minimum. All forces lie in the x-y plane. What is the magnitude of F? Hint: First find -the resultant of the two known forces. Force F acts in this * direction. Prob, 2-29 200 tb