Three beads are placed along a thin rod. The first bead, of mass m1 = 28 g, is placed a distance d1 = 1.5 cm from the left end of the rod. The second bead, of mass m2 = 11 g, is placed a distance d2 = 2.5 cm to the right of the first bead. The third bead, of mass m3 = 45 g, is placed a distance d3 = 4.6 cm to the right of the second bead. Assume an x-axis that points to the right.

(a) Find the center of mass, in centimeters, relative to the left end of the rod.
(b) Write a symbolic equation for the location of the center of mass of the three beads relative to the center bead, in terms of the variables given in the problem statement.
(c) Find the center of mass, in centimeters, relative to the middle bead.

Part a)

Center of mass with respect to the left end is given as

Part b)

Center of mass with respect to middle bead is

Part c)

Center of mass with respect to middle bead is

Explanation:

Part a)

As we know that the center of mass of the system of mass is given by the formula

here we have

Now we have

Part b)

As we know that the center of mass of the system of mass is given by the formula

here we have

Part c)

Now plug in the values in above formula

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

6 cos 34, 6 sin 34 trig