Question

A simple pendulum oscillates freely between points A and B.
We now put a peg (nail) at some point C as shown. As the pendulum moves from At to the right, the string will bend at C and the pendulum will go to its extreme point D. Ignoring friction, the point D.

• A. Will lie on the line AB
• B. Will lie above the line AB
• C. Will lie below the line AB
• D. Will concide with B

Answer 1

The correct option is A Will lie on the line AB

By mechanical energy conservation
$KE+U_1=K{E}_1+U_1$
$0+U_1=0+U_1$
$U_1=U_1$
$h_1=h_1$
So D will lie on line AB