name the point
(projectile motion critical values)
(projectile motion critical values)
the quadratic formula
quadratic models
projectile graph analysis
halloween trivia
100
How high up off the ground did the golf ball sit before Evan swung his club and hit it?
Initial Height / y-intercept
100
The quadratic formula song we heard in class is sung to the tune of this popular children's song.
Pop Goes the Weasel
100
f(x)=ax^2+bx+c
In standard form above, when
a
is negative, the parabola faces
downward
100
What was the initial height?
5 feet
100
Old name for halloween
All Hallow's Eve / Samhain
200
How long was the golf ball in the air?
Zero / Root / x-intercept
The "hit the ground" point
200
The quadratic formula is made to calculate, at most, this many answers.
Two
200
f(x)=ax^2+bx+c
In standard form above, the y-intercept is this ordered pair.
(0,c)
200
At what time does the projectile hit its peak height?
1.688 seconds
200
The first name of Dr. Frankenstein
Victor
300
When did the golf ball hit the peak of its path of flight?
x-value of vertex / maximum height
300
What does this mean?
\pm
plus or minus
300
The x-value of the vertex of
y=ax^2+bx+c
x=(-b)/(2a)
300
What is the maximum height of the projectile?
50.563 feet
300
"Trick or treat, _____________
give me something good to eat.
smell my feet
400
What was the distance to the ground when the golf ball was at its peak?
y-value of vertex / maximum height
400
The quadratic formula is used to calculate what?
x
or, the value of the input (x-axis) variable when the output (y-axis) variable is zero
or, the roots of the quadratic
400
How do you find the time at which a projectile hits the ground, given the equation
y=ax^2+bx+c?
x=(-b+-sqrt(b^2-4ac))/(2a)
400
For how many seconds is the projectile in the air?
3.465 seconds
500
What was the height of the ball 2 seconds after Evan hit it?
Value, h(t) when t=2
500
The quadratic formula cannot be calculated (in traditional ways) when this is negative.
The value under the square root (called the discriminant)
500
If you have the x-value, how do you find the y-value of the vertex of
y=ax^2+bx+c
Plug it in for x in y=ax^2+bx+c
500
What number do we ignore here and why?
-0.09 because it's negative and doesn't apply to the situation
(there is no negative time)
500
Of all of the "halloween songs," this is considered the most popular of all time
"Thriller" by Michael Jackson