P4 a

Distance Time Graph Characteristics

• 
• A-B = constant speed
• B-C = stationary
• C-D = constant speed
• D-E = stationary
• E-F = Constant speed in other direction.
• Curves represent acceleration and deceleration.
• Displacement time graphs are basically the same except the gradient tells you the velocity.
• Speed = vertical
• ------------
• horizontal

Displacement Time Graph Characteristics

• 
• Displacement time graphs are basically the same as distance time graphs except their gradient = velocity instead of speed.
• A distance here is either positive or negative so it is either going in one direction or the other.
• When distance is given with a particular indication of direction it is called displacement.
• So on the third line, when it goes down back to where it originated, the line then goes into the negative because it is going back in the other direction.

Velocity Time Graph Characteristics

• 
• Gradient = acceleration on velocity time graphs.
• The red section (flat parts) represent moving in a straight line at a constant speed.
• The steeper the gradient, the greater the acceleration or deceleration.
• The / sections are acceleration in a straight line.
• The \ sections are downhill acceleration in a straight line.
• A curve line means changing acceleration.
• Negative velocity means that it is travelling in the opposite direction.
• Speed-time graphs are similar to velocity time graphs but ignore direction.
• Acceleration = vertical
• -------------
• horizontal

Slide 4