Mechanics (Kinematics) Constant Velocity Zero acceleration

Review of Variables These are all the variables you may see in Mechanics problems Xi - initial position (m) Xf - final position (m) Vi - initial velocity (m/s) Vf - final velocity (m/s) a – acceleration (m/s2) t – time (s)

Constant Velocity Key Point: Acceleration is always 0, but velocity will not be 0. or The object is still moving, but velocity is unchanging.

Equation Displacement (m) = velocity (m/s) * time (sec) Δx = v t

Example During a race on level ground, Andra runs with an average velocity of 6.02 m/s to the east. What is Andra’s displacement after 137 s?

Example During a race on level ground, Andra runs with an average velocity of 6.02 m/s to the east. What is Andra’s displacement after 137 s? Givens: v = 6.02 m/s t = 137 sec

Example During a race on level ground, Andra runs with an average velocity of 6.02 m/s to the east. What is Andra’s displacement after 137 s? Givens: v = 6.02 m/s t = 137 sec Formula Δx = v t → Δx = (6.02m/s)(137s)

Example During a race on level ground, Andra runs with an average velocity of 6.02 m/s to the east. What is Andra’s displacement after 137 s? Givens: v = 6.02 m/s t = 137 sec Formula Δx = v t → Δx = (6.02m/s)(137s) Solution: Δx = 825 m to the East

Practice For classwork, complete Practice A on page 44 in your textbook.