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A heavy ball of mass M is suspended from the ceiling of a car by alight 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 waves-speed increases to 60.5ms−1, the value of a, in terms of gravitational acceleration g, is closest to :

a.

 

b.

 

c.

 

d.

 


Question ID - 50054 | SaraNextGen Answer

A heavy ball of mass M is suspended from the ceiling of a car by alight 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 waves-speed increases to 60.5ms−1, the value of a, in terms of gravitational acceleration g, is closest to :

a.

 

b.

 

c.

 

d.

 

1 Answer - 5876 Votes

3537

Answer Key : (a) -

60=

60.5= =

+

 g2+a2+g2+g2

a = g

= .



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