Which statement is true for the numbered figures shown? A) In figure I, the two
ID: 1389868 • Letter: W
Question
Which statement is true for the numbered figures shown?
A) In figure I, the two disks are stuck together and forces F1 and F2 are applied to each disk in the directions show. If there is no net toriue on the system then the torique applied to the smaller disk is upward and the torque applied to the bigger disk is downward and their magnitueses are the same.
B) In figure I, the two disks are stuck together and forces F1 and F2 are applied to each disk in the directions shown, if F1 = F2 then the system has a net torque that is upward and the angular acceleration of the two disks are the same magnitude but downward.
C) In figure II the tangetntial speed of hte endge of the disk and of hte sring on each side of hte disk are the same and are exactly the same as the speeds of the falling masses
D) In Figure III, as long as the gears are not slipping, both toothed pulleys have the same tangentail speeds, but the angular speed of pully A is greater than that of pulley B because of their different radii.
E) Both C) and D) are TRUE.
F) None of these are TRUE.
M > /gExplanation / Answer
A)
true, because the net torque is zero , direction of applied force are in opposite direction, hence torque due to these two forces are also acts in opposite direction
B)
False , because if the body rotating with net torque angualr accelration may upward or downward
it depend on the whether body speed is decreses or increases
C)
true, here tangential accelration of the disk is same as the accelration of the falling body
D)
true , because v=r*w ....here v is constant so, if r increases,w decreases
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