Question

Which example(s) below involve zero work? choose all that apply.in case it is not obvious, i do mean work in a physics sense (i.e. we have a rather precise definition of work).a person holds a child.a person pushes a car stuck in the snow but the car does not move.a rope supports a swinging chandelier.a person pulls a sled uphill?

Answer 1

#1) the person holding a baby
- holding implies no motion--> no distance--> no work


#2) the car stuck in the snow
- they're trying to get it out which means that there may be some oscillation. so technically a very small amount of work is being done.