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kaite
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A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 18 in 13.0 . Assume the merry-go-round is a uniform disk of radius 3.0 and has a mass of 760 , and two children (each with a mass of 21 ) sit opposite each other on the edge.
Calculate the torque required to produce the acceleration, neglecting frictional torque.
What force is required at the edge?
torque= I alpha
w=2pi f
w=w0+alpha *t
change f to w
w= 2pi *.3rev/sec w=1.8849
find alpha
w=w0+ alpha*t 1.8849=alpha*13 alpha = .144997
find I
I= .5 MR^2= 3609
torque= I alpha = 3609*.144997= 523 this answer was incorrect I do not know why I also tried it with I for a hoop the answer was 1046 but this answer was also incorrect if you can tell me where i messed but that would be very helpful thanks
Calculate the torque required to produce the acceleration, neglecting frictional torque.
What force is required at the edge?
Homework Equations
torque= I alpha
w=2pi f
w=w0+alpha *t
The Attempt at a Solution
change f to w
w= 2pi *.3rev/sec w=1.8849
find alpha
w=w0+ alpha*t 1.8849=alpha*13 alpha = .144997
find I
I= .5 MR^2= 3609
torque= I alpha = 3609*.144997= 523 this answer was incorrect I do not know why I also tried it with I for a hoop the answer was 1046 but this answer was also incorrect if you can tell me where i messed but that would be very helpful thanks