+0  
 
+3
368
5
avatar+1832 

 

 

 

from the graph .. why from tb to tc speeds slows down  !! 

xvxvxv  Sep 24, 2014

Best Answer 

 #2
avatar+86859 
+13

Note that, the slope of the curve at any point is just the velocity at that point. So, from B to C, the slope approaches 0, indicating that the velocity (in the positive direction) is decreasing (but not yet = 0). And at C, the velocity = 0 (since the slope = 0 at that point). And from C to D, the velocity begins to increase again (in the negative direction) because the slope of the curve gets ever steeper between these two points. And note that, from D to E, the velocity slows again because the slope is aproaching 0.

 

CPhill  Sep 24, 2014
 #1
avatar+26716 
+13

Velocity is the slope of the curve of x against t.  Between A and B the slope (hence the velocity) is increasing.

Between B and C the slope (hence the velocity) is decreasing (the velocity is still positive, but getting smaller).

Alan  Sep 24, 2014
 #2
avatar+86859 
+13
Best Answer

Note that, the slope of the curve at any point is just the velocity at that point. So, from B to C, the slope approaches 0, indicating that the velocity (in the positive direction) is decreasing (but not yet = 0). And at C, the velocity = 0 (since the slope = 0 at that point). And from C to D, the velocity begins to increase again (in the negative direction) because the slope of the curve gets ever steeper between these two points. And note that, from D to E, the velocity slows again because the slope is aproaching 0.

 

CPhill  Sep 24, 2014
 #3
avatar+1832 
+3

verrrrrrrrrry clear ... thank you alan and cphill ... 

xvxvxv  Sep 24, 2014
 #4
avatar+92623 
+3

I didn't answer LOL,  it was Alan and Chris.  Thanks guys

Melody  Sep 25, 2014
 #5
avatar+1832 
+3

haha .. sorry its by mistake 

xvxvxv  Sep 25, 2014

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