Kinematic Equations Review

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100

What has to be true in order for us to use the kinematic equations? 

Constant acceleration

200

An object starts from rest and accelerates at a rate of 7m/s² for 4s. What is the final velocity at 4s? 

28m/s

300

A car is driving 32m/s on the freeway when they slam on the brakes causing an acceleration of 5m/s².  How much time will it take them to stop? 

6.4s

400

Mr. Mann throws a ball straight up with an initial velocity of 18m/s.  Calculate the maximum height the ball reaches. 

16.5m

500

A person pulls on a wagon, and it accelerates at a rate of 0.85 m/s². The wagon starts at rest and the person pulls it at that rate for a distance of 15m. How much time will it take the person to pull the wagon 15m?

5.94s

Flexible Equations

100

An object is described by the following equation:

x_f=12-5t+0.5t²

What is the displacement of the object after 4s?

0m

200

A car drives half way around a circular track in 12s. The radius of the track is 80m.  Calculate the average velocity of the car. 

13.33m/s

300

A car drives half way around a circle in 12s.  The radius is 80m. Calculate the average speed of this car. 

20.9m/s

400

Write the velocity as a function of time equation that corresponds to the following position as a function of time equation:

x_f=10+2t

Horizontal at v=2

500

Write the corresponding velocity as a function of time equation for the following position-time function: 

x_f=4+8t+6t²

v_f=8+12t

Ready, Set, Graph!

100

What is the y-intercept for the following kinematic equation:

x_f=7+5t-2t²

7m

200

Sketch the velocity-time graph for the following equation:

v_f=-2+3t

y-intercept: -2

Slope: 3

300

Sketch a velocity-time graph for the following equation:

v_xf=8-t

y-intercept=8

slope=-1

400

Sketch a position-time graph for the following equation:

x_f=-4+0.5t

y-intercept=-4

slope=0.5

500

Sketch the position-time graph for the following kinematic equation:

x_f= -3+8t-2t²

Concave down parabola.

y-intercept=-3

vertex= (2,5)

Variable Identification

100

x_f=2+3t-4t²

What is the initial position of the object? 

2m

200

v_xf=5t

What is the initial velocity of the object?

0m/s

300

v_xf=-1+8t

What is the acceleration of the object? 

8m/s²

400

x_f= 8+4t²

What is the initial velocity of this object? 

0m/s

500

x_f=-9+7t-8t²

^{What is the acceleration of this object?} 

-16m/s²

Sidequesting

100

What was wrong about the Einstein poster during the first week class activity? 

E=mc³

200

How do you know if something is concave up or down from the equation? 

a is positive = concave up

a is negative = concave down

300

Who is the youngest out of the 8th grade teaching team? 

Ms. Nunn

400

What is the exact degree with specialty that Mr. Mann got at the University of Arizona? 

Masters of Theoretical Astrophysics 

500

What is the name of one of Mr. Mann's tortoises? 

Tank or Cinnamonroll