Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm
-
A.
(frac{1}{140})(pi) -
B.
14(pi) -
C.
70(pi) -
D.
140(pi)
Correct Answer: Option D
Explanation
V.R = (frac{2pi L}{p})
= (frac{2 times pi times 2}{0.3})
V.R = 140(pi)