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Physics Chapter 4.
Chapter 4 End Quarter Test Study Guide Grade 9.
|Newton's 1st Law:||An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced, external force.|
|Newton's 2nd Law:||If a body is acted upon by an external force, it will accelerate in the direction of the unbalanced force with an accelerated proportional to the force.|
|Equilibrium:||When net force equals zero, an object remains in the same motion (no acceleration)|
|Net Force:||Sum of all the forces acting upon an object.|
|Apparent Weight:||How heavy an object feels, force pushing up on an object by the floor.|
|Centripetal Force:||A force directed towards the center that causes an object to follow a circular path.|
|Centripetal Acceleration:||Occurs due to velocity direction change.|
|Radius:||Distance from center of a circle to the outer edge.|
|Normal Force:||Force from the surface of an object; contact force that makes 90 degree angle with surface edge.|
|Work:||The product of the displacement and force in the direction of the displacement; scalar quantity.|
|Power:||The time rate at which work is done and energy is transformed.|
|Dot Product:||Can only multiply two vectors that are in the same direction.|