Aphoto frame weighing 4.16 newtons is hanging by a wire making an angle with the horizontal. the tension experienced by both wires is 3 newtons. what angle is made by both wires with the horizontal? a. 13.7º b. 24.3º c. 43.9º d. 45.4º e. 49.2º

C. 43.9 on plato, got 100% on the test :)

option C. 43.9°

Explanation:

Refer to the diagram. The tension in the two strings is equal T₁=T₂=T = 3 N

The strings support a frame weighing, W= 4.26 N

We will write the tension in the strings as the sum of their horizontal and vertical components.

The horizontal components balance each other and cancel out.

T₁ cos θ = T₂ cos θ  

On the other hand, The vertical component would support the weight of the frame.

2 T sin θ = W

2 × 3 N × sin θ = 4.16 N

sin θ = 0.693

⇒ θ = sin ⁻¹(0.693)  = 43.9°

Hence, the angle made by two wires with the horizontal is 43.9°.

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: