Physics · PYQ NEET UG 2019(2)

A truck is stationary and has a bob suspended by a light string, in a frame attached to the truck. The truck suddenly moves to the right with an acceleration of \( a \). The pendulum will tilt

1. A
   to the left and angle of inclination of the pendulum with the vertical is \( \tan^{-1}(\frac{g}{a}) \)
2. B
   to the left and angle of inclination of the pendulum with the vertical is \( \sin^{-1}(\frac{g}{a}) \)
3. C
   to the left and angle of inclination of the pendulum with the vertical is \( \tan^{-1}(\frac{a}{g}) \)
4. D
   to the left and angle of inclination of the pendulum with the vertical is \( \sin^{-1}(\frac{a}{g}) \)