Notes 4/13/10

• Acceleration- Change in velocity divided by the time change to occur; speeding up, slowing down and or changing a direction.
• Acceleration can be calculated if you know how an objects velocity has changed during a given time period
• The Formula- A(acceleration)={SF(final speed)-SI(speed initial)}/Time
• Unit for acceleration=(m/sec^2) Meters per second square
• Acceleration is positive when an object is speeding up.
• Acceleration is negative when an object is slowing down.
• Accelerated motion can be graphed with speed on the vertical axis.
• When an object is speeding up the graph has a positive slope(going to the right and up)
• When an object is slowing down the graph has a negative slope(going to right and down or left)
• A horizontal line indicates zero acceleration and is going at a constant speed.