Shoulder pain is any pain in or around the shoulder joint. When tendons become trapped under the acromion, the rigid bony arch of the shoulder blade, it can cause shoulder pain called impingement syndrome.
The period for a simple pendulum does not depend on the mass or the initial anglular displacement, but depends only on the length L of the string and the value of the gravitational field strength g, according to The mpeg movie at left (39.5 kB) shows two pendula, with different lengths.
The frequency is the number of cycles per second. For example, if the period of a pendulum is 2 seconds, it s frequency is 0.5 cycles per second (0.5 Hz). When to use periodor frequency While both period and frequency tell us the same information, we usually use period when cycles are slower than a few per second.