a student pushes a car with all his strength, but the car doesn’t move., WORK, NO WORK, A student lifts a book from the floor and places it on a table., WORK, NO WORK, A student walks across the classroom carrying a backpack at a constant height, WORK, NO WORK, a student pulling a toy cart on the floor, WORK, NO WORK, a student pushes hard against a wall, but the wall doesn’t move, WORK, NO WORK

WORK OR NO WORK

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