Answer Happy

A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. The translational speed of the ball is 3.95 m/s at the bottom of the rise. Find the translational speed at the top. Number i ! Units m/s 0.760 m
The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right edge, and the force remains perpendicular as the door turns. No other force affects the rotation of either door. Starting from rest, door A rotates through a certain angle in 3.20 s. How long does it take door B (also starting from rest) to rotate through the same angle? Axis Number Door A Axis Door B i Units S