The bob of a pendulum is released from a horizontal position If the length of pendulum is 2 m, what is the speed with which the bob arrives at the lower most point. Assume that 10% of its energy is dissipated against air resistance: (Take 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
: The situation is as shown in the figure.
Potential energy of the bob at A = mgh
Kinetic energy of the bob at 
As 10% of the energy of the bob is dissipated against air resistance.
of mgh or 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A neutron travelling with a velocity v and K.E. E collides perfectly elastically head on with the n…
A ball bounces to 80% of its original height. What fraction of its mechanical energy is lost in eac…
The negative of the work done by the conservative internal forces on a system equals to the change …
A particle of mass m is moving in a horizontal circle of radius r, under a centripetal force equal …
A ball of mass m is dropped from a cliff of height H. The ratio of its kinetic energy to the potent…
The amount of energy released in burning 1 kg of coal is: