The pratt truss below supports a roof with a factored load of p = 40 k. a. indicate which members are in tension and label their required strengths in kips. show that you can compute the loads by hand, but feel free to check your work using analysis software. b. based on gross yielding alone, design the diagonal tension members as a36 angle sections (fy = 36 ksi, fu = 58 ksi), selecting the lightest possible l4×4 member for each. c. using a single line of 1/2" bolts spaced at 2" on center, compute the number of bolts required for each member such that the gross yielding design strength is less than the net section rupture design strength.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

As newton's first law states a object in motion stays in motion

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.