Question

Find The Angle in Radian through which a pendulum swings if its length is 75 cm and the tip describes an Arc of length is 10 cm​

Answer 1

$\fbox{ \fbox{ \bold{ \large{Given :- \: }}}}$

$\bold{ \large{ \: Length \: Of \: Arc \: = \: 10 \: Cm \: </p><p> }} \\ \bold{\large{ \: Radius \: Of \: The \: Circle \: = \: 75 \: Cm \: }}$

$\fbox{\fbox{ \bold{ \large{ \: To \: Find \: :- \: \: }}}}$

$\bold{ \large{ \: Angle \: ( \: In \: Radian \: ) \: \bold{ = \: ? \:} }}$

$\fbox{ \fbox{ \bold{ \large{ \: Solution \: :- \: }}}} \\ \bold{\large{Angle \: ( \: In \: Radian \: ) \: = \: \frac{l}{r} \: }} \\ \\ \bold{\large{Angle \: ( \: In \: Radian \: ) = \: \frac{10}{75} = \frac{2}{15} }}$

Answer 2

Answer

Angle = 1/r

Here:

Angle = 10/75

Simplified way;

=> 2/15