Problem

Which example(s) below involve zero physics work? Choose all that apply. (a) A person h...

Which example(s) below involve zero physics work? Choose all that apply.

(a) A person holds a child.

(b) A person pushes a car stuck in the snow but the car does not move.

(c) A rope supports a swinging chandelier.

(d) A person uses a self-propelled lawn mower on a level lawn.

(e) A person pulls a sled uphill.

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