Acceleration Part 2

Let's learn some more about Acceleration!

yay

Poll

How are you today?

Remember acceleration?

Multiple Choice

Practice:
Elliot rushed out the door and jumped into his parked car. He slammed down on the gas and after 3 seconds he was already moving at 40 mph. What was his rate of acceleration?

 $a=\frac{V_f-V_i}{t}$  

• 120 mph/s

• -120 mph/s
  

• 13.3 mph/s

• -13.3 mph/s

Multiple Choice

The winning racer won the race in 3.80 seconds. From a stopped position at the start the racer reached a top speed of 326.63 mph. What was the racer's rate of acceleration?

• 86 mph/s

• -86 mph/s

• 1241 mph/s

• -1241 mph/s

What if we didn't know how long it took us to reach our top speed?

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Good news! We can use displacement!

Multiple Choice

April sets up on the blocks at the starting line for a 100m sprint. The race starts and she takes off reaching a final speed of 21 m/s after passing the finish line. What was April's rate of acceleration?

 $a=\frac{V_f^{\ 2}-V_i^{\ 2}}{2d}$  

• 0.21 m/s²

• 0.11 m/s²

• 4.4 m/s²

• 2.2 m/s²

Multiple Choice

Jett is driving through downtown Dallas. He is moving at a speed of 18 m/s before he comes up to a stoplight. If it takes Jett 45 m to come to a complete stop, then what was is his rate of acceleration?

 $a=\frac{V_f^{\ 2}-V_i^{\ 2}}{2d}$  

• -0.2 m/s/s

• 0.2 m/s/s

• -3.6 m/s/s

• 3.6 m/s/s

That's all folks!

That's all I got for you today, hopefully it wasn't too mind melding. There is 1 more assignment today in the classroom. Click the paper/pencil on the wooden boards to the right and that'll lead you to make a copy of the assignment. Make sure to submit that assignment in google classroom.