Question

The period of oscillation of a simple pendulum of length $l$ suspended from the roof of a vehicle which moves without friction down an inclined plane of inclination $\alpha$, is given by

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

Effective acceleration due to gravity will be,

The period of oscillation of the pendulum will be,

T=$2\pi \sqrt{\frac{l}{g_{eff}}}$=$2\pi \sqrt{\frac{l}{gcos\alpha }}$