Question

Consider a simple pendulum of mass m mounted inside a railroad car that is accelerating to the right with constant acceleration a. Analyse this problem in the non inertial frame of reference to find the angle equation with the vertical direction at which the pendulum will remain at rest relative to the moving car.

10 Feb 2026
Answer :
Word Count : 232
In a non-inertial reference frame, such as the accelerating railroad car, we must account for the fictitious forces acting on the pendulum. Since the car is accelerating to the right with acceleration (a), the pendulum will experience an additional force to the left due to the non-inertial reference frame. This fictitious force (F_{\text{fict}} = -ma) acts
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