A real process may be nearly adiabatic if it occurs over a very short time. How does the

PHYS 101 LECTURE NOTES WEEK 2 Spencer Kociba Drexel University Lecture 3​ (01/17/17) Chapter 2: Motion Along a Straight Line ● Dot/Scalar Products ○ A · B =< Axi, y j,zA k >·=*|A|*|B| cosϕ ○ i · j = 0, i · k = 0, j · k = 0 ■ Because i⊥j⊥k so cos(90) = 0 ○ i · i = j · j = k · k = 1 ● Vectorial/Cross Products ○ A x B=C ○ B x A=-C ○ ixi = jxj = kxk = 0 ○ i x j = k, j x k = i, k x i = j ○ |A x B| = |A| |B| sinϕ * * ● Displacement: the vector between the starting and ending point of an object’s path ○ In a straight line: Δx =2x −1x and Δy = 2 − 1 ● Distance: length of the total path traveled ● Kinematics: study of motion Δx ● Average velocity: Δt ● If the x coordinate is... Velocity is... Direction Positive and increasing + +x Positive and decreasing - -x Negative and increasing + +x Negative and decreasing - -x ● Instantaneous velocity: velocity at a specific point (of time or position) ○ V x dx/dt ○ Slope of tangent line on an x(t) graph ● Acceleration ○ Average acceleration: rate of change