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Physics Ch.test
Ch. 5.1-6.1 test
Question | Answer |
---|---|
scalar | a quantity that can be completely described by a single value called magnitude |
magnitude | the size or amount and always includes units of measurement |
vector | a quantity that includes both magnitude and direction |
three ways to describe a force | graph; magnitude, anglle; x-y pair |
components | can replace a force vector, is a perpendicular vector; the legs of the triangle, sides a and b |
the original vector | side c or hypotnuse of a triangle |
free-body diagram | a diagram that uses vectors to show all of the forces acting on an object |
displacement | a vector that shows a change in position |
projectile | any object moving through air and only affected by gravity |
trajectory | the path a projectile follows |
horizontal distnace | dx=vxt |
vertical distance | dy=4.9t2 |