A metre scale is moving with uniform velocity. This implies .

Options

A. the force acting on the scale is zero, but a torque about the centre of mass can act on the scale.
B. he force acting on the scale is zero and the torque acting about centre of mass of the scale is also zero.
C. the total force acting on it need not be zero but the torque on it is zero.
D. neither the force nor the torque need to be zero.

Answer

B

Explanation

When a metre scale is moving with uniform velocity, the force acting on the scale is zero and the torque acting about centre of mass of the scale is also zero.