Problem 2: A yo-yo is made of two uniform disks, each of mass M and radius R, which are glued to a smaller central axle of negligible mass and radius 0.5R (see figure). A string is wrapped tightly around the axle. The yo-yo is then released from rest and allowed to drop downwards, as the string unwinds without slipping from the central axle. Side view R. R/2 M M

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Problem 2: A yo-yo is made of two uniform disks, each of mass M and radius R,
which are glued to a smaller central axle of negligible mass and radius 0.5R (see
figure). A string is wrapped tightly around the axle. The yo-yo is then released from
rest and allowed to drop downwards, as the string unwinds without slipping from the
central axle.
Side view
R
R/2
M
M
Part (a) Find the moment of inertia, I, of the yo-yo with respect to an axis through the common centers of the disks, in terms of the mass and
radius.
Expression :
I =
Select from the variables below to write your expression. Note that all variables may not be required.
а, В, ө, а, d, g, H, ј, k, М, Р, R, S, t, V
Part (b) Find the linear speed V of the yo-yo, after it has descended a distance H.
SchematicChoice :
4gH
2gH
/2gH
V =
3
V =
%3D
V =
VgH
%3D
Part (c) Calculate the magnitude of the linear velocity V, in meters per second, of the yo-yo after it has fallen a distance 0.45 m.
Numeric : A numeric value is expected and not an expression.
V =
Transcribed Image Text:Problem 2: A yo-yo is made of two uniform disks, each of mass M and radius R, which are glued to a smaller central axle of negligible mass and radius 0.5R (see figure). A string is wrapped tightly around the axle. The yo-yo is then released from rest and allowed to drop downwards, as the string unwinds without slipping from the central axle. Side view R R/2 M M Part (a) Find the moment of inertia, I, of the yo-yo with respect to an axis through the common centers of the disks, in terms of the mass and radius. Expression : I = Select from the variables below to write your expression. Note that all variables may not be required. а, В, ө, а, d, g, H, ј, k, М, Р, R, S, t, V Part (b) Find the linear speed V of the yo-yo, after it has descended a distance H. SchematicChoice : 4gH 2gH /2gH V = 3 V = %3D V = VgH %3D Part (c) Calculate the magnitude of the linear velocity V, in meters per second, of the yo-yo after it has fallen a distance 0.45 m. Numeric : A numeric value is expected and not an expression. V =
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