Question

Questions 21 - 22 refer to a picture attached to the wall. A picture of weight 20 N is attached by a string looped symmetrically over a nail. The forces acting on the picture and the nail are represented in the figure below. 21. The tension $\vec{T}$ of the string is equal to: A. $\frac{\sqrt{3}}{20} N$ B. $\frac{\sqrt{3}}{10} N$ C. $\frac{20}{\sqrt{3}} N$ D. $20 N$ E. $20\sqrt{3} N$ 22. A similar picture is attached by another string of different length looped the same way over the nail. The angle formed by the string over the nail is smaller than the one in the first picture. Let $\vec{R'}$ be the upward normal force and $\vec{T'}$ the tension on the string. Which of the following expressions is true? A. $R = R'$ and $T = T'$ B. $R = R'$ and $T > T'$ C. $R = R'$ and $T < T'$ D. $R < R'$ and $T > T'$ E. $R > R'$ and $T < T'$

          Questions 21 - 22 refer to a picture attached to the wall.
A picture of weight 20 N is attached by a string looped symmetrically over a nail. The forces acting on the picture and the nail are represented in the figure below.
21. The tension $\vec{T}$ of the string is equal to:
A. $\frac{\sqrt{3}}{20} N$
B. $\frac{\sqrt{3}}{10} N$
C. $\frac{20}{\sqrt{3}} N$
D. $20 N$
E. $20\sqrt{3} N$
22. A similar picture is attached by another string of different length looped the same way over the nail. The angle formed by the string over the nail is smaller than the one in the first picture. Let $\vec{R'}$ be the upward normal force and $\vec{T'}$ the tension on the string.
Which of the following expressions is true?
A. $R = R'$ and $T = T'$
B. $R = R'$ and $T > T'$
C. $R = R'$ and $T < T'$
D. $R < R'$ and $T > T'$
E. $R > R'$ and $T < T'$

questions 21 22 refer to a picture attached to the wall a picture of weight 20 n is attached by a string looped symmetrically over a nail the forces acting on the picture and the nail are re 85386

Added by Carolyn C.

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