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).
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. The bar, pulley, and rope have negligible mass, the rope does not slip, and there is no friction in the axle of the pulley. Under these conditions
A) tL = tR.
B) tL = tR.
C) tL = tR.
D) tL = 2tR.
E) tl = 4tR.
Question 2
A 72.0-kg person pushes on a small doorknob with a force of 5.00 N perpendicular to the surface of the door. The doorknob is located 0.800 m from axis of the frictionless hinges of the door.
The door begins to rotate with an angular acceleration of 2.00 rad/s2. What is the moment of inertia of the door about the hinges?
A) 4.28 kg m2
B) 7.52 kg m2
C) 1.88 kg m2
D) 0.684 kg m2
E) 2.74 kg m2
Dermatological changes with myxedema can occur behind the eyes or in the lower leg, as shown here.
Commonly Used Equivalents for the Apothecary and Metric Systems Cont
Open-ocean systems vary in their biological diversity
Prefilled Unit-Dose Systems
Development of the Reproductive Systems
The four RNA ribonucleotides. Shown in their mono-phosphate forms