Mathematics 2: Formative Assessment 5

The Mathematics 2 club launched a rocket and recorded its height and distance travelled. What was its approximate maximum height?

• 4 feet

• 8 feet

• 10 feet

• 14 feet

A raft is dropped from a helicopter 256 feet in the air above the ocean.  Its approximate height, h, after t seconds is given by the function h(t) = -16t² + 256.  How many seconds did it take the raft to hit the water? 

• -4
• 2
• 4
• 8

What is the initial (starting) height of an object following a path given by the equation h(t) = -16t² +20t + 6?

• -16 feet 
• 0 feet
• 20 feet 
• 6 feet 

An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height after t seconds is represented by the equation 
h(t) = –16t² + 64t + 80.
What will be the object's maximum height? 

• 2 ft
• 80 ft
• 144 ft
• 64 ft

If path of a projectile is modeled by: 
h(t) = -16t² + 20t +6, what is the height after 1 second? 

• 6 feet 
• 20 feet 
• 10 feet 
• 4 feet 

In a projectile problem, if I want to find out when an object hits the ground, I should _________.

• Use x = (-b/2a) as my answer.
• Set the equation to 0 and solve.

• Replace x with 0 and evaluate.
• Find the y-coordinate of the vertex.

When I want to find the maximum or minimum height of an object, I should_____.

• Set the equation = 0 and solve.
• Use x = (-b/2a) as my answer.
• Substitute x = 0 into the equation.
• Find the y-coordinate for the vertex.

The parabola shows the trajectory of a tennis ball that was hit with a tennis racket. What is the starting height of the tennis ball? (Click the picture to enlarge it)

• 3 feet - y-intercept

• 12 feet - vertex

• 1.5 seconds - vertex

• 3 seconds - x-intercept

An object in launched directly upward and the height of the object is represented by the equation s(t) = –16t² + 64t + 80. What is the maximum height?

• 144 feet

• 80 feet

• 16 feet

• -16 feet

Atarah shoots an arrow upward at a speed of 80 ft/sec from a platform of 25 ft. high. The path of the arrow can be represented by the equation h(t)= -16t² + 80t + 25, where h is the height and t is the time in seconds. What is the maximum height that the arrow reaches?

• 80 ft.

• 90 ft.

• 140 ft.

• 125 ft.