Linear Acceleration

Change in velocity

because velocity is a vector, change in velocity is also a vector, change in velocity has magnitude and direction

Linear Acceleration

Rate of change of linear velocity, gives average acceleration from t0-t1

Acceleration as change in speed

acceleration can reflect a change in the magnitude of velocity without a change in direction

Acceleration as change in direction

acceleration can reflect a change in the direction of velocity without a change in magnitude

Acceleration in 1D

velocity and acceleration…

-in same direction: velocity increases magnitude

-in opposite direction: velocity decreases magnitude

Effects of instantaneous acceleration

-with direction of motion, speed increases

-against direction of motion, speed decreases

Propulsive Phase

-magnitude of velocity increases

-velocity and acceleration in same direction

Braking Phase

-magnitude of velocity decreases

-velocity and acceleration in opposite direction

Static Phase

-velocity stays constant

-acceleration=0