please go to the link provided to view animated examples of related rates of change... This is the next topic on applications of differentiation and I thought it would be useful for you to take a peek at it. It is, anyway, closely linked to Chain Rule which you have already learnt.
After that, you are invited to post (constructively) your comments on:
1) the usefulness of the animated examples
2) your ability to understand the application of Chain Rule to problems on related rates of change
To view:
i) Go to http://www.ace-learning.com.sg
ii) Userid and password are your NRIC number ie. S9234567Z
iii) Then come back to Mamamath Blog to click on the link here. Click on the 'Video Lesson'
Have fun!