Calculate the velocity ratio of a screw jack of pitch 0.2cm if the length of the tommy bar is 23cm
A
230\(\pi\)
B
23\(\pi\)
C
70\(\pi\)
D
140\(\pi\)
Verified Correct Answer: A.
Physical Principles & Numerical Solution
P = 0.2cm, L = r = 23cm
VR
=
2\pir
P
=
2\piL
P
=
2\pi\times23
0.2
=
230\pi
Source: Myschool Past Questions Archive (Record #55597)