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11-05-2018
Mathematics

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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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calculista calculista

20-05-2018

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

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