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2-1 Discussion: Two-Dimensional Motion, Forces, and Newton's Third Law Choose a real world situation, such as...

2-1 Discussion: Two-Dimensional Motion, Forces, and Newton's Third Law

Choose a real world situation, such as diving off a diving board, rocket propulsion, or birds flying, and select a motion within that situation that does not occur in a straight line, and is set in motion by the interaction of two objects. Motion that does not occur in a straight line indicates that more than one force is acting on the object and they are responsible for what you are seeing. Try to identify the forces that are causing the motion you selected. Describe how Newton’s third law applies to that motion. Since the forces are equal and opposite, be sure to account for size and directions of the motion of the two objects before and after the interaction.

Expert Solution

Real-world example taken: Diving off a diving board

Object 1: Diving board.

Object 2: A diver diving off the diving board.

The forces that are causing the motion we see:

Force 1: Gravitational force.

Force 2: Normal reaction of the diving board.

How Newton’s third law applies to that motion:

When a diver dives off the diving board he pushes the diving board downwards and as a result, he moves upward from the normal reaction of the diving board(as the diving board exerts an equal and opposite force with which it was pushed downward). So the more force the diver applies on the end of the diving board(i.e. bending it more downward), the higher she ables to jump.

So, usually divers use a jump on the end of the diving board to apply more force and something the jump on it multiple times so that they can jump even higher.

Action: Bending/Compressing of the diving board by the diver (uses Force 1, Gravitational force).

Action is done on the board by the diver.

Reaction: Diver getting in an upward direction (uses Force 2, Normal reaction of the diving board).

The reaction is felt by the diver due to the board.

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genius_generous answered 2 years ago

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