Translational and rotational movement

Welcome readers, here we bring you a new informative article through which you can learn to differentiate the movements of rotation and translation , and in turn, nourish yourself with examples from everyday life in which these movements are carried out and we are not aware of it. In addition, you will find important definitions related to the subject followed by equations to calculate them. Do not forget to share the article on Facebook, or any other social network you use. Let’s start !!!

What is itThe rotational motion is the angle covered by the body θ at time t.The translational motion is the distance that the body x covers in a given time t
How the body movesHere the body rotates, so the path of rotation is considered. It moves rotationallyThe translation movement has no rotation, only the linear path is considered. It moves in a linear way
What energy is consideredHere the angular kinetic energy is considered.Here linear kinetic energy is considered.
Are the axes of rotation considered?The axes of rotation are considered here.The axes of rotation are not considered here.
ExampleThe rotation of the earth around its own axisA person running

What is translational motion?

The translational movement , worth the redundancy, is that movement in which a body moves in a linear path instead of a rotational one. For example, a cannonball is fired in a rectilinear trajectory. Here all the points of the body that are in motion are in the same direction. Translational motion is generally seen in rectilinear motion when the body is moving in a straight line. When we say that when the earth revolves around the Sun we are facing a totally rotational movement, we are wrong, since there is rotation when it rotates on its same axis, but there is revolution.when the earth revolves around the sun. If the body covers the distance x at time t, the translational motion would be the function of t. Therefore, the translational movement is defined as: «The movement where the body moves but does not rotate from one point to another. It has three degrees of freedom.

Translational dynamics

It is the study of translational motion that investigates the effect of force on motion using basic equations and analyzes what the motion of objects is and how they are affected by various forces. The tools used to study motion are many, of which Newton’s laws of motion are one. The First Law states that any body, whether at rest or in motion, will not change its state unless we apply an external force to it, while the Second Law establishes the relationship between mass and acceleration, where the force is the product of mass and acceleration, where it is difficult to change the translational motion of a larger mass object than the smaller one.

Translation movement

Movement itself is nothing more than movement. The translational motion of any body can occur along a curved path or along straight lines. Since the body experiences these changes in its movement when a force acts on it, the movement takes place depending on the mass, the body that has a larger mass would have less translational movement, while the body that has a lighter mass has much more movement. This study of translational movement is known as translational dynamics .

Examples of translational motion

Let’s see some examples about the translational motion:

  • A boy running
  • A man kicks the ball.
  • Bullet fired from the gun.
  • The butterfly flying
  • The man who rides the bicycle.

What is rotational motion?

A rotation is a circular motion of an object around a center of rotation . If a three-dimensional object like the Earth, the Moon, and other planets always rotates around an imaginary line called the axis of rotation. The axis passes through the center of mass of the body, the body is said to rotate on itself or rotate.

When you say “Rotation” in Physics, it means movement of a mass per unit angle through an axis (called the axis of rotation). Rotation is the type of movement that has properties analogously to transactional movement.

Examples of rotational movement

  • Rotation of the earth around its own axis
  • Ballet dancers in the pose in which they raise their arms and turn their body supporting its weight with the tips of their feet

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