Motion

Movement and Position

Distance time graphs: Gradient = speed Straight line means constant Velocity (speed) time graphs: Gradient = acceleration Straight line means constant  Area under the graph = distance

Horizontal line is zero  Distance is a scalar  Displacement is vector Speed is scalar Velocity is vector

Acceleration: Rate of change of displacement is acceleration  Formula is: change in velocity divided by time taken  Change in velocity: v-u It is a vector quantity  Acceleration is increase in speed Deceleration is decrease in speed Units - m/s^2

Other formulas for this chapter: average speed= distance moved/time taken 2as= v^2 - u^2 v = u + at s = ut + 1/2 at^2