A majorette in a parade is performing some acrobatic twirlingsof her baton. Assume that the baton is a uniform rod of mass 0.120 kg and length 80.0 cm.
With a skillful move, the majorette changes the rotation ofher baton so that now it is spinning about an axis passing throughits end at the same angular velocity 3.00 rad/s as before. What is the new angularmomentum of the rod?
A 0.30kg softball has a velocity of 15m/s at anangle of 35 degree below the horizontal just before making contactwith the bat. What is the magnitude of the change in momentum ofthe ball while it is in contact with the bat if the ball leaves thebat with a velocity of (a) 20m/s, velocity downward, and (b) 20m/s, horizontally back toward the pitcher?
-A noisy grinding machine in a factory produces a sound intensity of 1.00 * 10 ^ 5 * W / m2. Calculator (a) the decibel level of this machine, and (b) the new intensity level when a second, identical machine is added to the factory.
Water at a pressure of Pa flows through a horizontal pipe at a speed of 1.00 m/s. the pipe narrows to 1/4 its original diameter. Find the following:
A. The flow speed in the narrow section
B. the pressure in the narrow section