Year 12s: what will be the first way you research your future options? >>

average speed problem.

Hey guys .
im so confused by the section of c and d of this question . i can't just get my head around it. Any help would be appreciate it.

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Reply 1

username1560589

For section c, estimate the area under the curve between 2 and 4 seconds. For d, divide the distance by the time taken.

Reply 2

Alen.m

How will you be able to calculate the area under the curve tho as it's not like a proper shape?
Thanks for your help .

Reply 3

username1560589

Original post by Alen.m

How will you be able to calculate the area under the curve tho as it's not like a proper shape?
Thanks for your help .

I don't think you can work it out exactly, but you can estimate it.

Reply 4

Alen.m

is that the best answer you can get out of it mate?the text book says 18, kinda match with the estimate i have calculated .
Thanks for your help tho .

Reply 5

username1560589

Original post by Alen.m

is that the best answer you can get out of it mate?the text book says 18, kinda match with the estimate i have calculated .
Thanks for your help tho .

Yes, unless you know the equation of the curve, you can only estimate it.

Reply 6

lerjj

Original post by Alen.m

How will you be able to calculate the area under the curve tho as it's not like a proper shape?
Thanks for your help .

For the future, if the squares are smaller than this then you can count squares, counting only those that are more than half-filled. Alternatively you can use the trapezium rule and sum the areas of a number of equal width trapeziums. But yeah, these questions are dumb.