Question

In a simple pendulum of length 10 m, the string is initially kept horizontal and the bob is released. 10% of energy is lost till the bob reaches the lowest position. Then find the speed of the bob at the lowest position.

• A. $6 \;m/s$
• B. $6\sqrt5 \;m/s$
• C. $7\sqrt5 \;m/s$
• D. $4\sqrt2 \;m/s$

Answer 1

Answer: (B)

$6\sqrt5 \;m/s$

Answer 2

The correct option is (B): $6\sqrt5 \;m/s$