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Q. Why is rotational motion not considered as translatory motion?
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Answer 1

Answer:

☘Rotatory motion moving round and round on a fixed axis. Translatory motion means moving in a straight line.

Explanation:

All the motion discussed so far belongs to this category, except uniform circular motion.

✪ Rotational Motion:

Motion of an object about an axis: e.g. a basketball spinning on your finger, an ice skater spinning on his skates, the rotation of a bicycle wheel.

☆ Example:-

• Motion of wheel, gears, motors, etc is rotational motion.

✪ Translatory motion:-

motion in which all points of a moving body move uniformly in the same line or direction.

☆ Example:-

• An example of translational motion is a leaf blowing across a field.

⭐Differences:-

• An object has a rectilinear motion when it moves along a straight line. At any time, t, the object occupies a position along the line as shown in the following figure. The distance x, with appropriate sign, define the position of the object. When the position of the object at particular time is known, the motion of the particle will be known, and generally is expressed in a form of an equation which relates distance x, to time t, for example x = 6t - 4, or a graph.

Answer 2

Explanation:

In rotation the body's centre of mass does not undergo any translation motion. In other words the centre of mass will remain at on place. Like a top spinning on its axis. In circular motion the body's centre of mass goes around a fixed centre maintaining a constant distance from it.

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