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.
g/10
When car is moving with uniform velocity
----→(1)
When car accelerates with acceleration 
, net acceleration on the bob will be
-----→ (2)
From eqn (1)&(2)
1