Question

Find the angle in radian as well as in degrees through through which a pendulum swings if its length is 45 cm and its tip describe an arc of l 11 cm

Answer 1

we know that
$l = r \alpha$
where l.is the length of arc=11cm
r is the radius =45cm
so angle will be 11=45alpha
alpha=11/45 that angle is in radians
in degrees its 44 degrees.