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…