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Define Newton's Third Law.
For every action, there is an equal and opposite reaction.
What is an action-reaction pair?
A pair of equal and opposite forces acting between two interacting objects.
Define 'action' in the context of Newton's Third Law.
The force exerted by one object on another.
Define 'reaction' in the context of Newton's Third Law.
The equal and opposite force exerted by the second object back on the first.
What is an Atwood Machine?
Two masses connected by a string over a pulley, used to demonstrate the relationship between force, mass, and acceleration.
What is the effect of one object exerting a force on another object?
The second object exerts an equal and opposite force back on the first object.
What happens if the masses in an Atwood machine are equal?
The system remains in equilibrium (no acceleration).
What happens when you push on a wall?
The wall pushes back on you with an equal and opposite force.
What is the effect of Dave pushing off the ground?
Dave accelerates upwards.
What happens when a swimmer pushes on the wall?
The wall pushes back on the swimmer, propelling them forward.
In a typical Atwood machine diagram, label the forces acting on each mass.
For m1: Tension (T) upwards, weight (m1g) downwards. For m2: Tension (T) upwards, weight (m2g) downwards.
Label a free-body diagram for a block being pushed horizontally.
Applied force (F) to the right, Normal Force (N) upwards, Weight (mg) downwards, and Friction (f) to the left (if applicable).
Label the forces acting on a swimmer pushing off a wall.
Force by swimmer on wall (action), Force by wall on swimmer (reaction).
Label the forces acting on a block being pulled by a string.
Tension (T) along the string, weight (mg) downwards, normal force (N) upwards.
Label the forces acting on a child on a swing at rest.
Tension (T_L) and (T_R) upwards, Weight (W) downwards.