Question

if a point on the rim of a 21 cm, diameter fly wheel travels 5040 meters in a mint, through how many radians does the wheel turn in a second?

Answer 1

HELLO DEAR,



CIRCUMFERENCE


=> 2 X 3.142 X 10.5 = 65.982 cm = 0.65982 m


 5040 meter = 1 minute 

1 second = 5040/60 = 84 meters 

84 / 0.65982 = 127.31 revolutions 

127.31 X 2 π= 254.61 πradians



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THANKS

Answer 2

data :

diameter = 21 cm

2 r = 21 cm

r= 21 ÷2 cm

wheel travels in 1 minute =5040÷60

= 84m

distance covered by wheel in one second =84×100 cm= 8400 cm

1. solution
3. on: s=r 1
4. 8400÷ 10.5=800 radian