The Rotating Systems Shown in the Figure Differ Only in That
The rotating systems shown in the figure differ only in that the two identical movable masses are positioned a distance r from the axis of rotation (left),or a distance r/2 from the axis of rotation (right).If you release the hanging blocks simultaneously from rest,and call tL the time taken by the block on the left and tR the time taken by the block on the right to reach the bottom,respectively,then
A)tL > tR.
B)tL = tR.
C)tL < tR.
As shown in the figure,a 35.30-kg box is attached to a light string that is wrapped around a cylindrical frictionless spool of radius 10.0 cm and moment of inertia 4.00 kg ∙ m2.The spool is suspended from the ceiling,and the box is then released from rest a distance 3.50 m above the floor.How long does it take for the box to reach the floor?
A 385-g tile hangs from one end of a string that goes over a pulley with a moment of inertia of
And a radius of 15.0 cm.A mass of 710 g hangs from the other end of the string.When the tiles are released,the larger one accelerates downward while the lighter one accelerates upward.The pulley has no friction in its axle and turns without the string slipping.What is the tension in the string on the side of the 710-g tile?
A 15-kg child is sitting on a playground teeter-totter,1.5 m from the pivot.What is the magnitude of the minimum force,applied 0.30 m on the other side of the pivot,that is needed to make the child lift off the ground?