Q. 19

# The vector sum of a system of non-collinear forces acting on a rigid body is given to be non-zero. If the vector sum of all the torques due to the system of forces about a certain point is found to be zero, does this mean that it is necessarily zero about any arbitrary point?

No,

The sum of all the torques about the given certain point o is zero.

So,

Now, for any other arbitrary point sum of torques can be written as

In the above expression the second term may or may not vanish.

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