Ahollow steel [e = 30,000 ksi] tube (1) with an outside diameter of 3.250 in. and a wall thickness of 0.375 in. is fastened to a solid aluminum [e = 10,000 ksi] rod (2) that has a 1.750-in.-diameter and a solid 1.125-in.-diameter aluminum rod (3). the bar is loaded as shown. assume l1 = 70 in., l2 = 40 in., l3 = 27 in., r = 35 kips, q = 16 kips, and p = 28 kips. determine (a) the change in length of steel tube (1). (b) the deflection of joint d with respect to the fixed support at a. (c) the maximum normal stress in the entire axial assembly.

an enlarged virtual image

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance         (d) = 3 feet

time taken to lift                         (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

                  1 h.p   = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

                      h.p = (force × distance)/ time

                            = (10 × 3)/ 10

                            = 30/10

                            = 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts

terd muffin is the correct answer