Axis of Rotation

Definition of Axis of Rotation

Axis of Rotation is a line about which a three-dimensional object is rotated in space.

More about Axis of Rotation

    Axis of rotation of an object can be within the body or outside the body.

Examples of Axis of Rotation

example of  Axis of Rotation

    The blue line in the above figure is the axis of rotation of the sphere.

Video Examples: Rotation of Axes: Part A


Solved Example on Axis of Rotation

Ques: Which of the following solid is formed when the given triangle is rotated about X-axis?

    example of  Axis of Rotation
    Choices:
    A. Figure 1
    B. Figure 2
    C. Figure 3
    D. Figure 4
    Correct Answer: A

Solution:

    Step 1: When a triangle is rotated about X-axis, it forms a cone with its axis of symmetry as the same X-axis.
    Step 2: So, Figure 1 is formed when the given triangle is rotated along X-axis.
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