In physics, work is defined to be the product of force and
distance. So to have work, there must be some movement and the force must be
parallel to the direction of the movement. In this case, work is zero when
there is no movement and the force is not parallel to the movement. Hence, the
answers are:
a rope supports a swinging chandelier
a person pushes a car stuck in the snow but the car does
not move
a person holds a child
