IIT JEE , AIEEE Forum - Physics , Mechanics

waterdemon

Some more important points to be remembered:

We very well know that:

= rFSin@

And when Torque is a "Vector"

= r x F

Now,
1)For a goven Force, the torque is maximum when r is max.
For example, it is easier to close / open a door by applying
the Force at the edge of the door rather than at middle
or somewhere else.

2)Torque is max when Sin@ = max that is when @ = 90.
When Force is applied in a direction perpendicular to "r".

3)Torque is "Zero" when @ = 0 / 180.
For example the door can be rotated by applying a Force
in a Direction parallel to the plank.

Hope it helps.
Cheers!!!!!!!!!!!!

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