Please help urgently (1 Viewer)

[astroman]

anyone can you solve question 9 on page 22 of this ---> need to know quick. http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2000exams/hsc00_enginsci/95ENSC2.PDF

 

[astroman]

.

 

[astroman]

.

 

[astroman]

. help

 

[anomalousdecay]

I can help with part b.

Part a I can't do much because I am unfamiliar with the terminology.

 

[astroman]

what is the velocity ratio

 

[BLIT2014]

According to this site http://www.engineeringtoolbox.com/movement-ratio-d_1295.html
its also called the movement ratio

Movement Ratio
Movement ratio (or velocity ratio) of a machine is defined as the ratio of the distance moved by the effort to the distance moved by the load. Movement ratio can be expressed as

Mr = se / sl

= velocity ratio (1)

where

Mr = movement ratio

se = distance moved by the effort

sl = distance moved by the load

 

[BLIT2014]

Or
'The velocity ratio (VR) is the ratio speed of effort moving / speed of load moving. Since this usually takes the same amount of time, it can be expressed as distance moved by effort / distance moved by load. '

 

[astroman]

so is that 49÷17 or (pi x 337.5)÷(pi x 675)

 

[EpaX]

This question appeared in the 2013 HSC Q22 b)