cssa trials 2003 (1 Viewer)

[HSC :(]

hey

iv been tryna do tihs question for ages and still cant work it out... i did this for ma trials and STILL cant get the answer..


its question 4b, part III

thanx

 

[scandal]

i got this one totally wrong too

But here is my teachers solution:

Period is pi
amp is 2

Therefore in pi secs it travels 8 metres ( 2 metres to end point, 2m back to origin then to other end point and back to origin)

Therefore in 1 sec it travels 8/pi metres

Therefore in 60 secs it travels 60 x 8/pi metres

= 153 metres in one minute

Hope that helps

 

[underthesun]

Yep, that's the correct answer, although I had no idea that it was when I wrote that in the test.