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A heavy ball of mass M is suspended from...

A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m where m less than 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 :

A

a) `(g)/(30)`

B

b) `(g)/(5)`

C

c) `(g)/(10)`

D

d) `(g)/(20)`

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