NEET-XII-Physics
07: Circular Motion
- #16Let θ denote the angular displacement of a simple pendulum oscillating in a vertical plane. If the mass of the bob is m, the tension is the string is mg cos θ
(a) always
(b) never
(c) at the extreme positions
(d) at the mean position.digAnsr: cAns : (c) at the extreme positions
Tension is the string, `` T=\frac{m{v}^{2}}{r}-mg\,\mathrm{\,cos \,}\theta ``
When v = 0, `` \left|T\right|=mg\,\mathrm{\,cos \,}\theta ``
That is, at the extreme positions, the tension is the string is mgcosθ.
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