This document provides an overview of key concepts in kinematics, including: - Speed is a scalar quantity that measures how fast something is moving, while velocity is a vector that includes both speed and direction. - Mass is a scalar that measures the amount of matter in an object, while weight is a vector pointing toward the center of the Earth that represents the force of gravity on an object. - Common physics quantities can be classified as either scalars or vectors, and standard units are provided for measuring displacement, time, velocity, mass, force, and other quantities.

1. Kinematics : a branch of physics; a study of motion

10. Speed vs. Velocity
* Speed is a scalar (how fast something is
moving regardless of its direction).
Ex: v = 20 mps
* Speed is the magnitude of velocity.
* Velocity is a combination of speed and
direction. Ex: v = 20 mps, at 15 south of west
* The symbol for speed is v.
* The symbol for velocity is type written in
bold: (v) or hand written with an arrow: v

16. Mass vs. Weight
Mass
• Scalar (no direction)
• Measures the amount of matter in an object
Weight
• Vector (points toward center of Earth)
• Force of gravity on an object
& On the moon!!!
your mass would be the same, but the
magnitude of your weight would be less.

17. Some Physics Quantities
Scalars ----------- Vectors
• Distance --------- Displacement
• Speed ------------ Velocity
• Mass ------------- Weight
•Time ----------------------------
• Energy -------------------------
• Magnitude ------- Acceleration
• Magnitude ------- Force

18. Some Units
Quantity .………………... Unit (symbol)
 Displacement & Distance ….… meter (m)
Time ………………………….second (s)
Velocity & Speed ……………….(m/s)
Mass ………………………kilogram (kg)
 Force ……………………….Newton (N)

19. Some “SI Prefixes”
nano n 10-9
micro μ 10-6
milli m 10-3
centi c 10-2
deci d 10-1
deka da 101
hecto h 102
kilo k 103
mega M 106
giga G 109
Little Guys
Big Guys

20. 0.29 seconds
Another problem: A car travels 30,000 meters in 5
minutes, what is the car’s speed?
The answer

25. Graphing
A … Starts at home (origin) and goes forward slowly
B … Not moving (position remains constant as time
progresses)
C … Turns around and goes in the other direction
quickly, going back home.
1 – D Motion
x
t
A
B

31. Graphing Animation Link
Car Animation
This website will allow you to set the initial
velocity and acceleration of a car.
http://www.walter-fendt.de/ph14e/acceleration.htm

33. Thank you for being with
us. Have a nice day
Amal Sweis 