Q. A horizontal pipe contains water at a pressure of 100 kPa flowing with a speed of 1.50 m/s. The pipe narrows to one-half its original diameter. What are speed and pressure of the water when the pipe narrows?
Q. A 25-g rifle bullet travelling 280-m/s buries itself in a 3.6-kg pendulum hanging on a 2.8m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of pendulum's displacement.