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Select the INCORRECT statement(s); 1 Wo...

Select the INCORRECT statement(s);
1 Work done by static friction on an object is always zero.
2 A frame appear to be moving with constant velocity from another frame, it means both the frames are either inertial or non-inertial.
3 Acceleration of an object is observed to be zero from an inertial frame, it means no force is acting on the object.
4 Seperation between two particles is 4 not changing it means their relative velocity is zero,

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