How it works

Pysics unit two

Speed is calculated in m/s. The eqaution for speed is speed=distance (m) divided by time (s).

Distance time graphs;

• They show the distance an object moves in a amount of time.
• A line that is sloping up shows the object moving away from its starting point. If it slops down, the object is moving back. 
• The gradient (that is the slope) at any point gives the speed at that time.
• A steeper gradient shows a faster speed.
• A flat gradient shows the object had stopped.

Velocity and accelertation

• Velocity is an objects speed in a given direction.
• A change in velocity or speed is called accelertation.
• The equation for accelertation is, acellertation (m/s squared)= change in velocity (m/s) divided by time taken (s)
• The change in velocity is final velocity- orginal velocity.
• A negative acceleration (decelertation) means the object slows down.

Velocity time graphs

• Velocity time graphs show an object's velocity change with time. The gradient of the graph gives the object's acceleration.
• A steeper gradient means greater accelertation.
• A flat…