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Q. Why is rotational motion not considered as translatory motion? ​

Answer 1

Answer:

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

Answer 2

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

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Rigid Bodies:

Translational Motion And Rotational Motion

• When a body does not change its position with respect to time, we say that the body is in rest. But, if a body changes its position with respect to time, we say that it is in motion. There are different types of motion: translational, rotational, periodic, and non-periodic. In this article, we will be discussing the translatory motion and rotational motion.

What is Translatory Motion?

A type of motion in which all parts of the body move the same distance in a given time is known as the translatory motion. Translatory motion can be of two types: rectilinear and curvilinear.

If a body moves as a whole such that every part of the body moves through the same distance in a given time, then the body is said to be in translatory motion.

Translational Motion :-

A rectangular block sliding down the slanting edge of a right-angled triangle covers equal distance in equal intervals of time.

A car moving in a straight line, the path of a bullet out of a gun, etc are examples of translational motion.

Rotational Motion

Now let us imagine a circular block going down the edge of the right-angled triangle. Examining the location and orientation of different points on the cylindrical block will tell us something new. The points on the cylindrical body experience something much different from the rectangular block.

Rotational Motion :-

A circular block rolling down the slanting edge of a right-angled triangle experiences different magnitude of velocity in different directions.

Say you go to a bowling alley, and throw the bowling ball towards the pins. If you notice closely, you will see that the ball is not just moving forwards i.e. performing translational motion but it is also spinning on itself because of which you can spin and curve the entry of the ball; this motion is categorized as rotational motion. The motion of a rigid body which is not fixed or pivoted is either a pure translational motion or a combination of translational and rotational motion. Rigid bodies are fixed/pivoted experience motion which is rotational.

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