In multicellular organisms, there are millions of cells specialized to carry out specific functions, while in unicellular organisms, a single cell performs all basic functions.
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The speed of a cyclist on a circular track remains constant. This means that while the cyclist is continuously changing direction to stay on the circular path, the magnitude of their speed does not change.
The motion of the hammer or discus once released is similar to the motion of the piece of stone; both move in the direction they were moving at the time of release.
Examples include the motion of the moon and the earth, a satellite in a circular orbit around the earth, and a cyclist on a circular track at constant speed.
The hammer or discus moves in the direction it was moving at the time it was released.
An athlete gives the hammer or discus a circular motion by rotating his/her own body before releasing it.