30 Questions
What is the only force acting on a cannonball in projectile motion?
Gravity
Which direction does a cannonball move in projectile motion?
Both upwards and sideways
What is the value of acceleration due to gravity on Earth in meters per second squared?
-9.8
Which set of equations govern 2D projectile motion?
y = vi * t + ½ a * t^2 and y = vf * t + ½ a * t^2
What is the equation that represents the velocity of the cannonball in the x-direction?
vx = x / t
What is the first step recommended to calculate where to place the target on the floor?
Measure the speed of the marble moving across the horizontal part of the table.
What happens to the velocity of a cannonball in the x-direction once it is launched?
It remains constant
In the lab setup described, what does the center of the target on the floor represent?
A grade
Why does a cannonball experience an acceleration in the y-direction during projectile motion?
Due to gravity
What does a negative acceleration value signify in this context?
Marble is moving downward
What is critical to reduce in order to minimize the marble drifting sideways?
Time measurements accuracy
What is the significance of measuring the distance using a ruler or tape measure in the lab solution?
Calculating velocity in the x-direction
Which step involves calculating the time of flight from the edge of the table to the floor?
Step 4
What causes a marble to receive a 'C grade' in this lab setup?
'Y' variable being off
What should you do if your marble fails to hit the target even after following all previous steps correctly?
Change height of the table by adding books underneath each leg
What should you do if your marble starts to drift sideways during the lab experiment?
Build the ramp in a way that reduces sideways drift
Why is it important to measure the speed of the marble moving across the table?
To find the velocity in the x-direction
In the lab setup described, what happens when the marble leaves the table?
It starts moving directly horizontally
What is the main source of error in this lab experiment?
Using a stopwatch for timing
Which step in the lab solution involves calculating the displacement in the x-direction?
Step 5: Solve for x using time and velocity
What does a value of -9.8 for acceleration signify in this experiment?
The marble is falling under gravity
Why must you let go of your marble once it reaches the calculated position for the target?
To check for possible sideways drift
What is crucial about measuring the distance from the edge of the table across the floor?
It assists in positioning the target accurately
What is the main force acting on a cannonball during projectile motion?
Gravitational force
Which direction does a cannonball move initially after being launched in projectile motion?
Upward
What is the significance of setting up a sturdy ramp during the physics lab experiment?
To provide an inclined surface for the marble to roll down
Which set of equations governs 2D projectile motion according to the text?
$vf = vi + a * t$, $y = vi * t + ½ a * t^2$, $y = vf * t + ½ a * t^2$
Why does the cannonball experience a constant velocity in the x-direction once launched in projectile motion?
Because there are no forces acting horizontally
What role does gravity play in causing acceleration during projectile motion?
Gravity causes acceleration only in the downward direction
How do the kinematics equations of constant acceleration apply to projectile motion?
They provide a framework to analyze changes in velocity over time
Test your knowledge of the equations governing 2D projectile motion including velocity, displacement, and acceleration in the y-direction. Practice solving problems related to projectile motion scenarios like cannonballs being fired at angles.
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