Variables
Units
Definitions
Conceptual Questions
Projectile Motion Problems
Final Jeopardy
100
What does Δx stand for?
horizontal displacement
100
What are the SI units for time?
seconds (s)
100
The motion of objects moving in two dimensions under the influence of gravity is...
projectile motion
100
True or False: The horizontal component of a projectile's velocity is independent of the vertical component of its velocity.
True
100
At the instant a ball is thrown horizontally at a high speed, an identical ball is dropped from the same height. Which ball hits the ground first?
they both hit the ground at the same time
200
What does Δy stand for?
vertical displacement
200
What are the SI units for distance and displacement?
meters (m)
200
When air resistance is negligible, what is the vertical acceleration of a projectile equal to?
-9.81 m/s2
200
In the absence of air resistance, the angle at which a thrown ball will go the highest is...
90 degrees
200
If a ball is thrown upwards at 35 m/s, how fast is it going when it returns? (ignore air resistance)
35 m/s downwards; same height same speed #parabola #symmetry
300
What does vyi stand for?
initial vertical velocity
300
What are the SI units for speed and velocity?
meters per second (m/s)
300
When air resistance is negligible, what is the horizontal acceleration of a projectile equal to?
0 m/s2
300
In the absence of air resistance, the angle at which a thrown ball will go the farthest is...
45 degrees
300
A ball rolls off a table with a horizontal velocity of 1.5 m/s. If the height of the table is 1.00 m, what is the horizontal velocity of the ball just before it hits the floor?
1.5 m/s; horizontal velocity stays constant
400
What does vyf stand for?
final vertical velocity
400
What are the SI units for acceleration?
meters per second squared (m/s2)
400
(TWO PART ANSWER) The path of a projectile through air is called _____________ and its path is in the shape of a _______________.
trajectory; parabola
400
At what point is the projectile's vertical velocity equal to zero?
at the highest point
400
A pool ball leaves a 1.2-meter high table with an initial horizontal velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground. ROUND TO TWO DECIMAL PLACES!
0.49 s
500
What does v or vx stand for?
horizontal velocity
500
Ft/sec is an example of units for...
(a) time
(b) displacement
(c) velocity
(d) acceleration
(c) velocity
500
The only force that acts on a projectile is...
the force of gravity
500
True or False: Mass has an effect on projectile motion.
False
500
A cannon ball is launched at a speed of 8 m/s at an angle of 0 degrees. It lands 16 m away from the cannon. At what HEIGHT was the cannon shot? ROUND TO TWO DECIMAL PLACES!
19.62 m
500
33.03 m/s