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How to calculate direct proportion

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How to calculate direct proportion

129,666 views November 2, 2013 7:10

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ChannelSimon Deacon

Description from the creator

How to work with direct proportion is aimed at around grade A / B at GCSE. The video deals with calculating 'k' - 'the constant of proportionality.'

There is an example of an A grade question:
"Winnie drops a stone down a well. The spped of the stone, v m/s, is directly proportional to the time, t seconds, since she dropped it.
After 0.5 seconds the stone is travelling at 4.9 m/s.
a) Find a formula for v in terms of t
b) Calculate the speed of the stone after 1.2 seconds"

I hope the video helps and please do leave a comment - thanks!

Visit mathswrap.co.uk for real maths, tips and techniques.

About this tutorial

Simon Deacon published this 7:10 video tutorial on November 2, 2013. It has been watched 129,666 times on YouTube.

Category
Education
Duration
7:10
Published
November 2, 2013
Views
129,666
Likes
1,086

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