Physics Important please
posted by rosa .
A yoyo of mass m rests on the floor (the static friction coefficient with the floor is mu ). The inner (shaded) portion of the yoyo has a radius R1 , the two outer disks have radii R2 . A string is wrapped around the inner part. Someone pulls on the string at an angle Beta (see sketch). The "pull" is very gentle, and is carefully increased until the yoyo starts to roll without slipping.
For what angles of beta will the yoyo roll to the left and for what angles to the right?
a) YoYo rolls to the left if sin beta<R1/R_2 , and to the right if sin beta> R_1/R_2.
b)YoYo rolls to the left if sin beta>R1/R_2 , and to the right if sin beta<R_1/R_2
c)yo yo rolls to the left if cos beta< R_1/R_2 and to the right if cos beta>R_1/R2
d)yo yo rolls to the left if cosbeta>R_1/R_2 and to the right if cosbeta< R_1/R_2 .
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