A heavy ball of mass M is suspendeed from the ceiling of a car by a light string of mass m (m < < M). When the car is at rest, the speed of transverse waves in the string is 60 ms⁻¹. When the car has acceleration a, the wave-speed increases to 60.5 ms⁻¹. The value of a, in terms of gravitational acceleration g, is closest to:

Oscillations and Waves: JEE Main 2019 Physics question

JEE Main 2019 · 9 Jan, Morning shift · Q8490

JEE Main 20199 Jan, Morning shiftPhysicsHardOscillations and Waves185× since 2002

A heavy ball of mass M is suspendeed from the ceiling of a car by a light string of mass m (m < < M). When the car is at rest, the speed of transverse waves in the string is 60 ms^

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1. When the car has acceleration a, the wave-speed increases to 60.5 ms^

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1. The value of a, in terms of gravitational acceleration g, is closest to :

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