What is the Average Speed and Acceleration of a Car on a Straight Road?

[Tonia]

45 mi/hr = 0 + 9 mi/hr/sec times t
Solve for t??

 

[Tonia]

t would be 5.

 

[haruspex]

45 mi/hr = 0 + 9 mi/hr/sec times t
Solve for t??

What was the speed you calculated in part a)?

 

[Tonia]

22.5 mi/hr

 

[haruspex]

22.5 mi/hr

Right. That is the speed you are told to use in answering part d).

 

[Tonia]

so t is 2.5 seconds and that's the answer to d.

 

[haruspex]

so t is 2.5 seconds and that's the answer to d.

Yes.

 

[Tonia]

Okay. thanks for your help!

 

[Tonia]

Let me ask you one more question just to make sure: for problems a) and c), the answer is the same? 22.5mi/hr??

 

[haruspex]

Let me ask you one more question just to make sure: for problems a) and c), the answer is the same? 22.5mi/hr??

Yes.

 

[Tonia]

Okay, thanks!