Smartphone Motion and Height Analysis

The video tutorial explains how to determine when a smartphone, thrown upward from a 240-foot building with an initial velocity of 32 feet per second, will hit the ground. The height of the smartphone is modeled by a quadratic equation. By setting the height to zero, the equation is solved using factoring techniques. The solution is verified graphically, confirming that the smartphone hits the ground after 5 seconds.

What is the initial velocity of the smartphone when it is thrown?

• 16 feet per second

• 32 feet per second

• 240 feet per second

• 0 feet per second

What does the height of the smartphone become when it hits the ground?

• 16 feet

• 0 feet

• 240 feet

• 32 feet

What is the purpose of setting the height equation to zero?

• To find the initial velocity

• To determine when the smartphone hits the ground

• To calculate the maximum height

• To find the time of flight

What is the greatest common factor used in factoring the equation?

• 8

• 16

• 240

• 32

What are the factors of the trinomial inside the parentheses?

• t - 2 and t + 7

• t + 2 and t - 7

• t - 5 and t + 3

• t + 5 and t - 3

What is the time when the smartphone hits the ground?

• 3 seconds

• 5 seconds

• 7 seconds

• 10 seconds

Why is the solution t = -3 not valid in this context?

• Time cannot be negative

• The height cannot be negative

• The velocity is incorrect

• The smartphone cannot hit the ground

What is the leading coefficient of the trinomial inside the parentheses?

• 240

• 32

• -16

• 1

What does the graph of the function show about the smartphone's height after 5 seconds?

• The height is zero

• The height is at its maximum

• The height is negative

• The height is increasing

What is the significance of the point (5, 0) on the graph?

• The smartphone is at its highest point

• The smartphone is moving upwards

• The smartphone is on the ground

• The smartphone is at the initial height