Can the work by kinetic firctionon an object be positive? Zero?

Consider following statement (A) Work done by pseudo force in non-inertial frame itself cannot be positive (B) Net work done by static friction on the system (consisting surfaces I contact) is always zero (C) Net work done by Kinetic friction on the system (consisting surfaces in contact) may be positive (D) Work done by kinetic friction on a body may be positive Select correct alternative :-

Is the work done by a frictional froce be positive or negative ?

Assertion :- Work done is positive when force acts in the direction of displacement. Reason :- Work done by frictional force can not be positive.

What is the kinetic energy of an object?

The kinetic energy of the object

In each of the following a force F is acting on an object of mass m. The direction of dispalcement is from west to east shown by the longer arrow. Observer the diagrams carefully and state whether the work done by the force is negative, positive or zero.

Statement-1. For a charged particle moving from point P to point Q , the net work done by an electrostatic field on the particle is independent of the path connecting point P to point Q Statement-2. The net work done by a conservative force on an object moving along a closed loop is zero.