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Standard VII

Physics

Rotatory Motion

Which of the ...

Question

Which of the following motion(s) is/are exhibited by the drill bit of a drill machine when we pierce a hole in a wall?

Rotational motion only

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Rectilinear motion only

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Both rotational and rectilinear motion

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Both rotational and oscillatory motion

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Solution

The correct option is C Both rotational and rectilinear motion
While operating a drill machine in order to pierce a hole in a wall, we can observe that the drill bit rotates around its own axis. In order to dig a hole in the wall, we keep on moving it forward.
Thus, we can say that the drill bit exhibits rotational and rectilinear motion.
Oscillatory motion is defined as the to and fro motion of a body about its fixed position. The drill bit of a drill machine does not exhibit such motion.

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