Motion Diagrams
What does the slope of a distance–time graph represent?
What is SPEED?
What is the value of the vertical acceleration of a projectile near Earth’s surface?
What is 9.8 m/s² downward?
How much will the horizontal velocity change in 19.6 seconds?
What is 0?
On a velocity–time graph, a horizontal line above the x-axis represents what velocity?
What is Constant velocity?
Which velocity component of a projectile remains constant?
What is Horizontal velocity (vx)?
Which equation gives the horizontal velocity of a projectile after launch?
What is Vix=Vicosθ?
If a car’s velocity–time graph shows a downward slope, what is happening to the car?
What is Decelerating?
What shape does the path of a projectile follow?
What is a parabola?
A velocity–time graph shows a car starting from 0 m/s and accelerating uniformly to 20 m/s in 5 seconds. What is the car's acceleration?
What is 4 m/s2?
During which slope in a velocity–time graph is acceleration the greatest?
What is the steepest slope?
Two projectiles of the same mass are launched: one at 45°, one at 65°. Which goes higher?
What is the one launched at 65°?
A ball is kicked with an initial velocity of 20 m/s at an angle of 30°. What is its initial vertical velocity (Viy)?
What is viy=20sin(30°)=10 m/s?
The area under a velocity–time graph gives what physical quantity?
What is Displacement?
If you were to throw a rock 4.3 m/s, horizontally, and drop another from the same height, which would hit the ground first?
Neither, they would hit the ground at the same time!
A projectile is in the air for 4 seconds and is launched at an angle of 45°. Find its initial velocity. (Take g=9.8 m/s2)
What is vi=9.8(4)/2sin45°≈27.7 m/s?