Find the odd one out based on whether it is a simple machine or a complex machine:

Find the odd one out based on whether it is a simple machine or a complex machine:
  1. Bottle opener
  2. Sewing needle
  3. Mechanical wrist watch
  4. Ramp

Solution

A mechanical wrist watch is a complex machine containing many interconnected simple machines (gears, springs, levers), while the bottle opener, sewing needle, and ramp are single simple machines.

Asked in: Homi Bhabha Practice

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