Question
The motion of a torsional pendulum is:
- Periodic.
- Oscillatory.
- Simple harmonic.
- Angular simple harmonic.
Explanation:
Because it completes one oscillation in a fixed interval of time and the oscillations are in terms of rotation of the body through some angle.
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$Y = A\sin (100t)\cos (0.01x)$
where $Y$ and $A$ are in millimetre, $t$ is in seconds and $x$ is in metre. The velocity of wave is ..... $m/s$

