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1.
If 
then the angle between 
and 
is
then the angle between and is
2.
The angular amplitude of a simple pendulum is 
. The maximum tension in its string will be
. The maximum tension in its string will be
3.
A body is projected up a smooth inclined plane with a velocity 
from the point 
as shown in figure. The angle of inclination is 
and top 
of the plane is connected to a well of diameter 40 m. If the body just manages to cross the well, what is the value of ? Length of the inclined plane is 
, and 
from the point as shown in figure. The angle of inclination is and top of the plane is connected to a well of diameter 40 m. If the body just manages to cross the well, what is the value of ? Length of the inclined plane is , and