The direction of the linear velocity of a body moving in a circle is______________?
Correct answer: B. along the tangent
- A. along the axis of rotation
- B. along the tangent
- C. directed towards the centre
- D. directed away from the centre
Explanation
The instantaneous linear velocity of a point on a circular path is tangent to the circle at that point. It is therefore perpendicular to the radius, which points toward the centre. The likely mistake is choosing the centre-directed option, which describes centripetal acceleration rather than linear velocity.
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About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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