A simple pendulum of length $1 m$ has a bob of mas $10 g$ . Find the work done in moving the pendulum from a vertical position to a horizontal position. Take $g = 10 m s^{- 2}$ .

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Solution

Step 1: Given data,
Length of the pendulum, $L = 1 m$
Mass of the bob, $m = 10 g = 0.01 k g$
Step 2: Finding work done,
The work done is equal to change in gravitational potential energy, $W = m g h$
The length of the pendulum is equal to the increase in height, $h = L = 1 m$
Putting values, $W = 0.01 \times 10 \times 1 = 0.1 J$
Hence, the work done is $0.1 J$ .

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A simple pendulum of length 1m has a bob of mas10g. Find the work done in moving the pendulum from a vertical position to a horizontal position. Take g=10ms-2.

A simple pendulum of length $1 m$ has a bob of mas $10 g$ . Find the work done in moving the pendulum from a vertical position to a horizontal position. Take $g = 10 m s^{- 2}$ .