KEY TAKEAWAYS •
Newton’s laws of motion apply to the motion of objects and the forces applied to objects.
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The force that moves something must be external to the object or system in order to have movement.
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There will be x- and y-components to the force on the object, with x and y to be determined according to the system being looked at.
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The force is described as a Newton with a person’s weight being their mass multiplied by the force of gravity.
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Normal force is an upward force that directly opposes a person’s weight with respect to the surface they are standing on.
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There is kinetic friction, which applies to movement, and static friction, which applies to something stationary.
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Deformation is the change in shape of an object because a force has been applied to it. The force may be parallel to the length of a linear object or perpendicular to a linear object, such as a nail, wire, cylinder, or even a board.
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