Calculate the velocity ratio of a screw jack of pitch 0.2...
Calculate the velocity ratio of a screw jack of pitch 0.2cm if the length of the tommy bar is 23cm
230π
23π
70π
140π
Correct answer is A
P = 0.2cm, L = r = 23cm
VR | = | 2πr
P |
= | 2πL
P |
= | 2π×23
0.2 |
= | 230π |
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