name the point
(projectile motion critical values)
(projectile motion critical values)
the quadratic formula
quadratic models
projectile graph analysis
wintertime 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
Lay down in the snow and wave your arms and legs to make this shape
What is a snow angel?
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
This story is about an old man who gets visited by three ghosts and stops being a jerk.
What is A Christmas Carol?
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
This four-letter word is an old name for Christmas that comes from the French word for "birthday"
What is Noel?
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
400
This day in December is the day with the least amount of daylight
What is Winter Solstice?
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
This is the last day of winter.
What is March 22?