Physics Yr11 - Motion

Rectilinear Motion

motion in a straight line in a single dimension

Displacement

position, where an object sits on a straight line, distances from origin

Velocity

How fast an object is moving (m/s)

Acceleration

How quickly an objects speed is changing (m/s)

Uniformly accelerated motion

motion with a constant acceleration

Uniform rectilinear motion

motion with no acceleration at all

Vector

quatities with both magnitude (distance) and direction e.g. velocity and displacement (and more often than not acceleration)

Scalar

quatities with only magnitude (distance) and no direction e.g. speed and distance

Handling vectors

Make one positive (right) and one negative (left)

Instantaneous velocity

velocity you are traveling at a specific moment in time

Average velocity

velocity that we define as how quickly your position is traveling over time

Equation for average velocity

V_av = d/t

Relative velocity

how fast a moving observer sees objects moving around them

Equation for relative velocity

V_AB = V_A - V_B (A is relative to (as viewed by) B)