Question

power consumed. AA simple pendulum of length 1 m has a bob pf mass 10 g. Find the work done in moving the pendulum from a vertical position to a horizontal position. Take g = 10 m/s. 8. In the preceding question, if the bob is released from the horizontal position, what will be its velocity at the lowest position?​

Answer 1

Answer:

Correct option is

C

98 joule

As the pendulum falls from horizontal position to its lowest point, displacement of the bob is equal to l

From

v  

2

−u  

2

=2as

v  

2

=2gl

Kinetic energy at the lower point=  

2

1

​

mv  

2

=0.5(10)(2)(9.81)(1)=98.1J

Option C.