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The tip of a pendulum moves through an angle of 0.38 rad radians. If the radius of the pendulum is 25 centimeters then which of the following is the length of the arc the tip moves through
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The tip of a pendulum moves through an angle of 0.38 rad radians. If the radius of the pendulum is 25 centimeters then which of the following is the length of the arc the tip moves through

User Nizar Ouerghi
by
7.9k points

1 Answer

3 votes
we know that
circumference=2*pi*r
for r=25 cm
so
circumference=2*pi*25-----> 50*pi cm

if
2*pi radians (full circle) has a length of----------------> 50*pi cm
0.38 radians-------------------> x
x=0.38*50*pi/(2*pi)-----> x=9.5 cm

the answer is
9.5 cm
User Alexey Frunze
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8.7k points
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