A simple pendulum fixed in a car has a time period of 4 seconds when the car is moving uniformly on a horizontal road. When the aceelerator is eased, the time period changes to 3.99 seconds. Making an approximate analysis, find the acceleration of the car.


When car is moving with uniform velocity


When car accelerates with acceleration , net acceleration on the bob will be

----- (2)

From eqn (1)&(2)