The cookie is used to store the user consent for the cookies in the category "Other. This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. In image two, the ice skater has tucked her arms and legs inwards, decreasing the moment of inertia, resulting in an increased speed of rotation. In image one below, the ice skater is in an extended shape, increasing the moment of inertia, in this circumstance the ice skater will rotate but will do so at a slower rate. If a mass moves further away from the axis of rotation, then the moment of inertia increases and angular momentum decreases. If the mass moves closer to the axis of rotation then the moment of inertia decreases, resulting in the angular velocity increasing. Moment of inertia = mass x distance from the axis of rotationĪ body is unlikely to lose mass during a movement but it can change its distance or distribution from the axis of rotation. The moment of inertia can be calculated by multiplying the centre of mass x distance from the axis. If a mass has a low resistance to rotate, then it will have a higher angular velocity. If a body has a high reluctance to rotate (high moment of inertia), it would have a lower angular velocity. In other words, its reluctance to rotate. The moment of inertia is referred to as the resistance of a body to change state when rotating. Or in other words, how quickly something rotates. This is the movement of a mass around an object and is calculated by multiplying angular velocity with the moment of inertia.Īngular momentum = angular velocity x moment of inertia Angular velocityĪngular velocity is referred to as the speed of rotation. To explain the movement of a mass when it is rotating, we must first understand angular momentum.
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