Verify that the students know the SI units in which time, displacement, velocity, and acceleration are expressed. Point out that the variables commonly used to represent these quantities are the first letters of the corresponding term. Review definitions of the terms: time, displacement, velocity, and acceleration. A bar over a symbol, such as a ¯ a ¯, means average.The subscript 0 refers to an initial value sometimes subscript i is instead used to refer to initial value.Acceleration: a, measured in meters per second per second (m/s 2, also called meters per second squared).Velocity: v, measured in meters per second (m/s).Displacement: Δ d, measured in meters (m).Recall that each of these terms has a designated variable and SI unit of measurement as follows:
![acceleration physics acceleration physics](http://image.slideserve.com/1140003/instantaneous-acceleration-n.jpg)
Throughout this chapter we will use the following terms: time, displacement, velocity, and acceleration. What does a vector arrow represent? Ask them to name some quantities that are vectors and some that are scalars. See how much students remember about vectors. Explain that the capital Greek letter delta always means final minus initial and that the net change may be zero, positive, or negative. Lead students to their topics of interest, such as motor vehicles or sports. Explain that deceleration is not used in physics because acceleration is either positive or negative.
![acceleration physics acceleration physics](https://sites.google.com/a/lmsd.org/mrcookscience/_/rsrc/1468743335792/physics/speed-and-acceleration/9725360.png)
Begin a general discussion about acceleration and deceleration.
#Acceleration physics manual
In addition, the High School Physics Laboratory Manual addresses content in this section in the lab titled: Position and Speed of an Object, as well as the following standards: