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)







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1