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If s is a position function, determine what s(5)-s(4) represents. 

 

a) Instantaneous Velocity at t= 5 s 

b) average velocity between t=4 s  and t=5 s 

c) Instantaneous velocity at t = 4 s 

d) Position between t = 4 s and t = 5 s 

 

I believe the answer is d. 

 Feb 23, 2018

5+0 Answers

 #1
avatar+128399 
+2

Actually....I believe  "b"  is correct

 

 

Avg velocity  =    s(b)  -  s(a)

                          __________

                             b  -  a

 

So   

 

s(5)  -  s(4)

_________       =        s(5)  - s(4)

   5  -  4

 

 

cool cool cool

 Feb 23, 2018
 #2
avatar+956 
0

I thought it might be "b" but wouldn't they normally put it over a fraction? That's what made me think Position "d"

Julius  Feb 23, 2018
 #3
avatar+956 
0

Because if we think about it slope is (Average velocity) is change in position / time traveled. 

Julius  Feb 23, 2018
 #5
avatar+9464 
+3

In this case  5 - 4  =  1  so the denominator just equals 1  smiley

hectictar  Feb 24, 2018
 #4
avatar+128399 
+1

Vavg  =  change in displacement

             ____________________

              change in time

 

 

cool cool cool

 Feb 23, 2018
edited by CPhill  Feb 23, 2018

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