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 center of mass can act on the scale .
B. the 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 unifrom velocity the force acting on the scale is zero and the torque acting about centre of mass of the scale is also zero .