PH-UY 1013 Lecture Notes - Lecture 2: Hypotenuse, Pythagorean Theorem, Parallelogram
Document Summary
Dynamics- study of relationship between forces and motion. Scalar quantities- can be be expressed by a number and an appropriate unit. Vector quantities- have a specific direction and have magnitude. Vectors- arrows that represent vector quantities and the length represents magnitude and direction is direction of vector quantity. Resultant- sum of two or more vectors and the result of the combined effect of the vectors. Head-to-tail method- a diagram is drawn in which vectors are positioned so that tail of one vector is placed at head of the other vector. Parallelogram method- magnitude of resultant is found by measuring resultants length and direction is found by measuring angle between the resultant and any chosen direction. At 0 degrees, vectors point in the same direction. Direction of resultant = same as direction of the two vectors. At 180 degrees, vectors point in opposite direction. Magnitude of resultant = difference of magnitude of two vectors direction of resultant= direction of larger vector.
