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A simple pendulum is secrured in a flat ...

A simple pendulum is secrured in a flat railway car and set oscillations. Its time period is `T_(0)=2s.` The car puhed on to a downward incline having inclination `alpha=30^(@)` with the horizontal. What is the period of oscillation of the pendulum during th motion of the car on the incline? Assume it to be smooth.

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The correct Answer is:
`T=T_(0)//sqrt(cos alpha)=2.15s`
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