Describing motion

1) Origin

2) Distance

3) Displacement

1) is a reference point where we measure positions of moving objects

2) is the total length of the path the object has taken - scalar quantity

3) is the change in an objects position - vector quantity

• Speed formula

• Velocity formula

• Acceleration formula

• Speed = total distance / total time

• Velocity = change in displacement / total time

• Acceleration = change in velocity / total time

An object accelerates any time the objects…….

• Speed/velocity increases

• Speed/ velocity decreases

• Direction of motion changes E.g curved path

EVEN if the velocity is zero , there still can be acceleration

Acceleration is zero when…….

An object Is at rest

An object has constant velocity