Physics
Grade-9
Easy
Question
Select the correct statement(s) from the following:
I. Motion of a satellite and a planet is periodic as well as SHM.
II. Mass suspended by a spring executes SHM.
III. Motion of a simple pendulum is always SHM.
- I, II, and III
- I only
- II only
- I and II
Hint:
- The motion of satellite around a planat is periodic motion. For 'SHM', the motion has to be both periodic and oscilatory.
The correct answer is: II only
- The motion of satellite around a planat is periodic motion. For 'SHM', the motion has to be both periodic and oscilatory.
- A mass suspended from a spring executes simple harmonic motion.
- The pure SHM have small amplitude but in simple pendulum amplitudes are of considerable amount. So, its not the exact situation of simple harmonic motion but as it satisfies all other conditions like restoring nature, its time period. So, we can say its SHM.
- Hence I, II, and III
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