Identify the INCORRECT pair regarding motion and their examples?

Question

Accepted Answer

Step-by-step analysis:

- Translatory motion: All points of the body move the same distance in the same direction. A ball falling from a cliff (neglecting rotation) translates downward — pair (1) is correct.

- Periodic motion: Motion that repeats after a fixed time period $T$. The hands of a clock repeat their positions periodically (e.g. the minute hand every 60 minutes) — pair (2) is correct.

- Oscillatory motion: Motion that takes a body to-and-fro about a mean position (e.g. a pendulum). Earth moving around the Sun follows an approximately closed orbital path (elliptical) and is periodic but not a to-and-fro oscillation about a mean position — pair (3) is incorrect.

- Rotatory motion: Rotation about an axis. Fan blades rotate about their axis — pair (4) is correct.

Therefore the incorrect pair is (3): "Oscillatory motion – Earth moving around the sun." FINAL_ANSWER: c

Answer

Answer

Answer