Physical Science Section 2.2 Acceleration Physical Science Section 2.2

Acceleration Acceleration- change in velocity Change in speed or direction or both Positive and negative acceleration Positive- speeding up- velocity and acceleration occur in the same direction Negative- slowing down Velocity and acceleration occur in opposite directions

Acceleration Acceleration- has direction, just like velocity Acceleration – rate of change in velocity Acceleration= change in velocity/time a = (vf – vi) / t Units of a: m/s2 Units of v: m/s Units of t: s

Acceleration Graphs: constant speed: zero acceleration, positive acceleration, negative acceleration

Acceleration Wood Roller Coaster- Lower velocity Sways more No loops or steep hills Steel Roller Coaster- Higher velocity More rigid Inversion loops and steep hills