A student in a lab experiment jumps upward off a common bathroom scale as the lab partner records the scale reading. What does the lab partner observe during the instant the student pushes off? The scale reading will remain unchanged during the entire time the student is in contact with the scale.
The scale reading will increase momentarily then will decrease as the student is moving upward from the scale.
The scale reading will increase during the entire time the student is in contact with the scale.
The scale reading will decrease momentarily then will increase as the student is moving upward from the scale.