Scalar vs Vector
Up, up and away
?????
When acceleration is NOT 10
Launching a projectile
100
Has only amount (magnitude)
What is scalar
100
The acceleration due to gravity is
10 m/s2
100
Ignoring air resistance, if a book and a pencil are dropped at the same time from the same height, which will hit the ground first?
both will hit the ground at the same time
100
A car starting from rest has an initial velocity of
0 m/s
100
If you are finding how far horizontally a projectile flew then you are finding
x
200
Has magnitude (number) and direction
What is vector
200
The acceleration while a projectile is in the air the ENTIRE time is
10 m/s2
200
If you drive 20 miles north and then 20 miles south what is your displacement?
0 meters from start to finish
200
An object that has stopped moving has a final velocity of
0 m/s
200
If you are finding how high or the vertical distance than you are finding
Y
300
velocity, acceleration and displacement are all examples
What are vector quantities
300
If a object is tossed into the air and it takes 20 seconds to go up and back down - how many seconds was it going up for?
10 seconds going up
300
You drive 3 miles south and 6 miles east. What is your displacement?
?
300
For a kinematic problem that asks "how far" you need to find
distance (X) or distance (Y)
300
Why will an object launched horizontally hit the ground the same time as if it had been dropped?
Verticle distance (height) is the same and gravity is pulling them down at the same acceleration of 10 m/s2.
400
Distance and speed are examples of
What are scalar quantities
400
If you toss an object in the air, what is its velocity at the very top of its height - right when it changes direction?
Velocity is 0 m/s
400
You walk 6 blocks north, then 3 blocks south. Your displacement is
3
400
Vf =60 m/s vi =0 m/s acceleration = 5 m/s2 time = ? Solve
vf = at + vi 12 seconds
400
If a projectile is launched horizontally at a velocity of 20 m/s and hits the ground 2 seconds later, what horizontal distance did it travel?
x = vt 40 meters
500
60 miles northeast
What is an example of a vector quantity
500
The only force acting on a projectile is
gravity
500
Definition of displacment is
distance from start to finish (straight line)
500
vf = 50 m/s vi = 5 m/s t=9 s a=?
vf = at + vi 5 m/s2
500
An arrow shot horizontally hits the ground in 3 seconds. How high was it launched from?
Find Y! y = 1/2 * 10 * 9 y = 45 meters
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