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:The velocity ratio of an inclined plane?If U is the object distance and V the image…A screw jack with a Tommy bar of length 12cm is used…The diagram below illustrates a variation of the…The distance between the successive crests of a wave…SEE ALSO The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage applied across its terminals?