Which of the following exhibits rotational motion but not rectilinear motion?
A
A drill that bores a piece of wood
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B
A spinning fan
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C
The rear wheel of a moving bicycle
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D
A ball rolling on a straight road
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Solution
The correct option is B A spinning fan
A type of motion in which the body rotates about its own axis is known as rotational motion.
Rectilinear motion is the motion of an object moving in a straight line.
A ball rolling on a straight line undergoes both rotational and rectilinear motion.
Similarily, the drill and the rear wheel undergo both rotational and rectilinear motion.
But a spinning fan only rotates about its axis, it does not exhibit rectilinear motion.