A gramophone disc rotates at 60 …
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Gaurav Seth 4 years, 1 month ago
Angular velocity= w= 60rev/min
1 revolution= 2pi radian
one minute = 60 sec
w= 60*2pi/60
w= 2pi radian/sec
mass= 18g = 0.018 kg
distance =r= 8 cm = 0.08 m
f= mv^2/r
v=rw v^2=r^2w^2
f= mr^2w^2/r
r in division will be removed by removing square
F= mrw^2
f= 0.018*0.08*(2pi)^2
square of 2 is 4
nd pi^2= 9.87 as per your question
so:
0.018*0.08*4*9.87
= 0.05685
= 0.057
0Thank You