Calculate the velocity ratio of a screw jack of pitch 0.2cm if the length of the tommy bar is 23cm? by Sunday | Jan 4 | Physics WAEC | 0 comments A. 230π B. 23π C. 70π D. 140π Correct Answer: Option A A. 230π Users Also Read These:If the velocity ratio of a machine is 5. What is its…The bar in Tennyson's "Crossing the Bar" is a symbol…A bar AB is balanced horizontally on two knife edges…A screw jack with a Tommy bar of length 12cm is used…Which of the following properties of a long steel…