1. Force & Motion
Vocabulary

2. Reference Point: a point used to find or describe the
location of something

3. Position Location relative to a reference point;
it does have a direction

4. Distance quantity that refers to…
"how much ground an object has covered"
during its motion

5. Displacement Shortest distance from the initial
to the final position of a point
Thus, it is the length of an imaginary
straight path, typically distinct from the
path actually travelled

6. Motion
A change in position of an object over time

7. SPEED
Describes how fast an object
is moving.

8. Average Speed
distance
Average Speed =
time

9. Velocity
The speed of an object in a certain direction.

10. d Velocity V = t speed of an object in a certain direction.
V = velocity (meters/second)
d = distance (meters)
t = time (seconds)

11. Velocity
speed of an object in a certain direction.
seconds 3 1 2

12. Scalar
a measurement that does
NOT contain direction.
Example: Speed
Vector
a measurement that contains direction.
Example: Velocity

13. Acceleration is how quickly velocity changes over time.
Speed 3 1 2
Meters/second

14. Acceleration
how quickly velocity changes over time
(Vfinal - Vinitial)
___________
A =
time

15. Acceleration

16. Acceleration: the change in velocity over time.
change in velocity
Acceleration =
time
(v2 – v1 )
________
Acceleration =
Time
V1 = beginning velocity
V2 = ending velocity

17. f = m•a f = net force (newtons) m = mass (Kilograms)
Force: a push or pull upon an object resulting from the object's interaction with another object; forces only exist as a result of an interaction
f = m•a
force = mass • acceleration
f = net force (newtons)
m = mass (Kilograms)
a = acceleration (meters/second2)

18. Pressure is the amount of force exerted over a certain area.
Pressure = Force
Area

19. Pressure = Force (newtons)
Area (m2)
1 Pascal = 1 Newton/meter2

20. Friction  
The resistive force that occurs when two surfaces travel past each other.
Causes physical deformation
Generates heat

21. Friction  
The resistive force that occurs when two surfaces contact each other.  

22. {
Work
Distance
W = f • d
Force {
Distance