JEE Main Physics question

Physics Laws of Motion JEE Main

A plumb line is suspended from the ceiling of a car moving with horizontal acceleration a. What will be the angle of inclination with the vertical?

(A)tan⁻¹(a/g)Correct
(B)tan⁻¹(g/a)
(C)cos⁻¹(a/g)
(D)cos⁻¹(g/a)

Answer: (A)

Solution

In the car's (non-inertial) frame, a pseudo-force ma acts horizontally backward on the bob, alongside gravity mg downward. The

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Question ID VK-153231