# Physics Unit 2

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1. What is "Speed"?
rate at which distance is traveled
2. What is "Instantaneous Speed"?
how fast something is moving at a particular instant in time
3. What is "Displacement" and what direction does it go?
the straight-line distance between two points. Vector.

Direction goes from start to finish.

does not equal total distance traveled
4. What is "Velocity" and what direction does it go?
How fast something is moving and in what direction.

Always goes the same direction as motion.
5. What is the formula to find the average speed?
s=d/∆t
6. What is the formula to find the average velocity?
V=∆x/∆t
7. What is "Acceleration" and what direction?
Rate of change of velocity. [Change of speed OR direction in velocity]

• -- If speeding up, same direction as movement
• -- If slowing down, opposite direction of movement
8. What is ∆?
Delta [Final-Initial]

∆t = t-t0
9. Define: Free Fall

A=
motion under only the influence of gravity

-g or -9.8 m/s2
10. Kinematic Equation

V=
V=V0+at
11. Kinematic Equation

X=
X=X0+V0t+1/2at2
12. Kinematic Equation

V2
V2=V02+2a(X-X0)
13. Kinematic Equation
X-X0
1/2(V+V0)t
 Author: andreabyerly ID: 33851 Card Set: Physics Unit 2 Updated: 2010-09-13 21:50:59 Tags: Physics Folders: Description: Physics Unit 2 Show Answers: