Assertion: A pendulam is oscillating between points `A` , `B` and `C` . Acceleration of bob at points `A` or `C` is zero.

Reason: Velocity at these points is zero.

Options

A. If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. If Assertion is true, true but the Reason is false.
D. If Assertion is false but the Reason is true.

Answer

D

Explanation

At `A` and `C` , `v=0` . Therefore, radial acceleration `(v^(2))/(R)` is zero. But tangential acceleration `gsintheta` is non-zero.