A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression? By: Sunday|Published on: Jan 25|Categories: Physics WAEC| 0 comments A. 2Ï€r²/P B. 2Ï€r/P C. 2Ï€r/p D. P²/Ï€r Correct Answer: Option B B. 2Ï€r/P Users Also Read These:What is the image distance of an object placed at a…Calculate the velocity ratio of a screw jack of…The velocity ratio of an inclined plane?Two spanners X and Y of lengths 15cm and 20cm…If the velocity ratio of a machine is 5. What is its…SEE ALSO The crackling noise produced by aluminum roofing sheets on a house during a hot sunny day is a result of?