A pendulum bob swings through an angle of while moving along a circular arc of radius

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

A pendulum bob swings through an angle of

30^{\circ}

while moving along a circular arc of radius

1.2\,\text{m}

. Calculate the length of this arc. (a)

0.52\,\text{m}

(b)

0.63\,\text{m}

(c)

0.31\,\text{m}

(d)

0.44\,\text{m}