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Help meee pleassee im strugglingg  

 

 May 11, 2019
 #1
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a)  Acceleration is change of velocity divided by time, so in first 15 mins the velocity changes from zero to 50 km/h. Since this takes 1/4 of an hour the acceleration is 50/(1/4) or 200 km/hr2.

 

b) The distance is given by the area under the velocity curve, so work out the areas of the separate sections and add them up.  Make sure you express the time intervals in hours (or fractions of an hour).

 

c) The average speed of a section is given by (end velocity + start velocity)/2.  Calculate this for each section then do a time weighted average of the five sections.

 May 11, 2019
edited by Alan  May 11, 2019
 #2
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Thank you so much may god bless you and your family. 

 

I just have one question. How do i work out the time intervals because it goes in 7.5 and two squares = 15 minutes. How do i usr this to work out b and c 

Guest May 11, 2019
 #3
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Well, the second section has 4 squares, so this is 30 minutes, or half an hour; the third section is another 15 minute one; the fourth is 30 minutes and the fifth is also 30 minutes. 

Alan  May 11, 2019

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