A stone of mass 1 kg tied to a light inextensible string of length 
, whirling
in a circular path in a vertical plane. The ratio of maximum tension in the string to the minimum tension in the string is 4, If g is taken to be 
, the speed of the stone at the highest point of the circle is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Maximum tension in string at lowest
T max = 
+ mg ...
minimum tension in string at highest point.
T min = 
– mg ...
from energy conservation
= 2mgL + 
....
from &
T max = 
+ 5 mg ...
from &
4 = 
= 
= 9 mgL
V HP = 
= 10 m/s
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