Projectile Motion and Velocity Analysis

The video tutorial explains projectile motion with a negative launch angle, where an object is thrown below the horizontal. It covers the decomposition of velocity into horizontal and vertical components, and the calculation of horizontal distance and final velocity. An example problem involving an object sliding off a roof is used to illustrate these concepts, with detailed steps for solving for time, distance, and final velocity.

What is the initial angle called when it is below the horizontal in projectile motion?

• Neutral launch

• Negative launch

• Positive launch

• Zero launch

In projectile motion, which component of velocity remains constant?

• Total velocity

• Acceleration

• Horizontal velocity (VX)

• Vertical velocity (VY)

When an object slides off an inclined roof, what is the angle of the initial velocity relative to?

• The roof's angle

• The horizontal axis

• The ground

• The vertical axis

What is the equation used to calculate horizontal distance in projectile motion?

• Delta X = VY * t

• Delta X = VX * t

• Delta X = V * t

• Delta X = a * t^2

Which method can be used to avoid solving a quadratic equation when calculating time in projectile motion?

• Using only the first equation

• Using only the second equation

• Using the third equation

• Using both the first and second equations

What is the final velocity on the y-axis if the initial velocity is -3 m/s and the drop is -3 m?

• -3 m/s

• 3 m/s

• -8.23 m/s

• 8.23 m/s

How is the magnitude of the final velocity calculated in projectile motion?

• Using the sum of VX and VY

• Using the difference of VX and VY

• Using the Pythagorean theorem

• Using the tangent function

What is the angle of the final velocity if VX is 4 and VY is -8.23?

• 90 degrees

• 45 degrees

• -64.1 degrees

• 64.1 degrees

In which quadrant is the final velocity angle located if it is negative?

• Third quadrant

• Second quadrant

• Fourth quadrant

• First quadrant

What is the significance of the arctangent function in determining the final velocity's direction?

• It determines the angle

• It calculates the magnitude

• It finds the time

• It measures the distance