## View Poll Results: What is answer the following question?

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1. i m not able to solve this problem so can someone help me please
Q)A pendulum of length 2 m left at A When it reaches B,it loses 10% of its total energy due to air resistance. The velocity at B is:
A)6 m/s
B)1 m/s
C)2 m/s
D)8 m/s

2. Not enough information to frame the problem.

3. ok i got ans as 6.332

4. You assumed 10 for g, an initial height 2 m, and you calculate V at the bottom without considering the 10% loss of KE. That is why you got the incorrect 6.332
Multiply the the PE by 0.9 and you will get exactly 6 when using 10 for g, height of 2 and V at bottom

If you had used 9.81 for g the answer with a 10% loss would be 5.94 = 6, without the loss 6.26 again wrong.

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