A heavy ball of mass M is suspended 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…

Question

A heavy ball of mass M is suspended 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:

Accepted Answer

Correct answer: C. (c) v= T/ = M g g^2+a^2g= ( 60.560 )^2 1+ 12 a^2g^2=1+ 160 using by binomial approximation ⇒a= g 30 ⇒ closest answera= g5

Solution

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