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9danny
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Does a body rotating about a fixed axis has to be perfectly rigid for all points on the body to have the same angular velocity and the same angular acceleration? Why?
A rigid rotational body is an object that rotates about a fixed axis without any change in its shape or size. This means that all points on the object move in circular paths with the same angular velocity.
The moment of inertia of a rigid rotational body is a measure of its resistance to rotational motion. It depends on the mass distribution of the object and the distance of the mass from the axis of rotation.
Angular velocity and linear velocity are related through the formula ω = v/r, where ω is the angular velocity, v is the linear velocity, and r is the distance from the axis of rotation to the point of interest.
A fixed axis is an axis that remains stationary, while a moving axis is an axis that changes its position. In a rigid rotational body, the motion is described with respect to a fixed axis, and the movement of the object may cause the axis to appear to move.
Torque is a measure of the force that causes an object to rotate. The greater the torque applied, the greater the angular acceleration of the object. This means that the object will rotate faster or slower depending on the magnitude and direction of the torque.