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Speed of a pendulum bob at the lowest point after release from an angle

This type of question, asked 2 times: 28 Jun 2022, 29 Jan 2024. All 2 questions below, oldest first.

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  1. Question 1

    28 Jun 2022

    21
    A pendulum is suspended by a string of length 250 cm250\text{ }cm. The mass of the bob of the pendulum is 00 g00\text{ }g. The bob is pulled aside until the string is at 60∘60^{\circ} with vertical as shown in the figure. After releasing the bob. the maximum velocity attained by the bob will be ____\_\_\_\_ ms−1ms^{- 1}. (if g=10 m/s2g = 10\text{ }m/s^{2} )
  2. Question 2

    29 Jan 2024

    97
    The bob of a pendulum was released from a horizontal position. The length of the pendulum is 10 m10\text{ }m. If it dissipates 10%10\% of its initial energy against air resistance, the speed with which the bob arrives at the lowest point is : [Use, g:10 ms−2g:10{\text{ }ms}^{- 2} ]

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