Given that the total distance travelled by a train is and the deceleration is for the first second as shown in the speed-time graph below.Find:
a)the value of
b)the value of
First of all its not a trapezium .. (to know more about trapezium try to search the word "trapezium" in Wikipedia/google)
Ok here I will show you how I found that area
1st step:
Area of the two triangles (on the upper side) which will be formed when we form a line y= V
they are found using the formula 1/2 x (base) x (height)
Area of first triangle = 1/2 x (T) x (100-V)
Area of second triangle = 1/2 x (2T) x (100-V)
2nd Step :
Area of that rectangle which is below the line Y= V
= Length x Breadth
Area of rectangle = V x 4T
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Add them you get the complete area
as in previous post
Feel free to ask if there is any other doubt.