Physics Double

PHYSICS YEAR TEN - FORCES + MOTION

Velocity and Acceleration

• Speed measures how fast you're going. speed=distance/time
  
• Velocity measures how and fast you're going and the direction you're going in.
• Acceleration is how quickly speed is changing. acceleration=change in                                                                                                 velocity/timetaken
• Change in velocity can be a change of speed or direction.

Distance Time Graphs

• Gradient = speed.
  
• Flat sections = stopped.
• Downhill = going back to the start.
• Line curving up = acceleration.
• Line curving down = deceleration.

Velocity Time Graphs

• Gradient = acceleration.
  
• Flat = steady speed.
• steeoer the graph upwards = steeper the acceleration.
• steeper the graph downwards = steeper the deceleration.
• Area under the section of the graph = distance traveled.

Gravity

• Force of attraction between all masses.
• On the surface of a planet it will make things accelerate…