Velocity
Does velocity need direction? Why or why not?
Yes because it is a vector quantity, with both direction and magnitude
What equation(s) used to solve for position when given acceleration and velocity?
v2=v02+2a(x-x0)
What is acceleration?
A vector quantity measuring the change in velocity
What is displacement and distance?
Displacement - the distance from the initial point
Distance - the total amount traveled
What shape does a projectile make?
A downwards facing parabola
If Joe goes 30 meters left in 5 seconds, what is his velocity?
6m/s left
If Jessica goes from 45 mph to 73 mph on the tollway for 30 min, what is the equation for her acceleration?
v=v0+at
a=(v-v0)/t
How do you find acceleration from a velocity vs. time graph?
The slope or dividing velocity/time
Liz went 30 meters towards Molly and turned around and went 10 meters towards Jess. What is her displacement and distance?
Displacement: 20 m towards Molly
Distance: 40 m
What is a common scenario for projectile motion?
Anything thrown or launched.
Abby travels 36 meters right in 4 seconds. What is her velocity?
9 m/s right
v2=v02+2a(x-x0)
What is the acceleration of an object during free fall?
10m/s2 down
Can distance be found from a velocity vs. time graph? If so, how?
Yes, take the area between the graph and zero
Which way is velocity during projectile motion?
Tangent to the path of the object
(v+v0)/2
What are the three kinematic equations?
v=v0+at
x=x0+v0t+(1/2)at2
v2=v02+2a(x-x0)
What is the acceleration of an object traveling 48 meters in 4 seconds?
6m/s2
x=(1/2)at2
a=(2x)/t2
Justin goes 3 meters east and 4 meters north. What is the displacement and distance?
Displacement: 5 m northeast
Distance: 7 m
How do you measure vertical position of a projectile?
y=(1/2)gt2
How do you solve for velocity when given force, mass, and position?
a=(F/m)
v2=2ax
In what situations should kinematic equations be used?
2D motion
When given 2+ of acceleration, time, velocity, or position
Jenny is going 30 m/s down Stonebrook and then speeds up to 60 m/s over 50 meters. What is the acceleration?
v2=v02+2ax
27 m/s2
Molly was going down Stonebrook at 25 m/s for 75 seconds. How far did she go?
x=vt
1875 m
What is the vertical velocity of a projectile at the top of the trajectory?
0 m/s