iran-konkur 2013 Q164

iran-konkur · Other · konkur-riazi_1392 Circular Motion 1 Vertical Circular Motion (String/Pendulum)
164. A pulley whose string length is 2 meters and ball mass is 2kg, starting from a position where the string makes a $53^\circ$ angle with the vertical, is released from rest. The tension in the string at the moment it makes a $37^\circ$ angle with the vertical is how many Newtons? ($\sin 37^\circ = 0.6$, air resistance is negligible, $g = 10\,\frac{m}{s^2}$)
(1) $16$ (2) $20$ (3) $24$ (4) $36$
\textbf{164.} A pulley whose string length is 2 meters and ball mass is 2kg, starting from a position where the string makes a $53^\circ$ angle with the vertical, is released from rest. The tension in the string at the moment it makes a $37^\circ$ angle with the vertical is how many Newtons? ($\sin 37^\circ = 0.6$, air resistance is negligible, $g = 10\,\frac{m}{s^2}$)

\hspace{1cm} (1) $16$ \hspace{2cm} (2) $20$ \hspace{2cm} (3) $24$ \hspace{2cm} (4) $36$