Question

Find the velocity ratio of a screw jack with pitch 0.3cm and length 6cm.

Answer 1

Given data:

Length;

`L=6\text{ cm}`

Pitch;

`p=0.3\text{ cm}`

The velocity ratio is given as,

`VR=(2\pi L)/(p)`

Substituting all known values,

`\begin{gathered} VR=\frac{2\pi*(6\text{ cm})}{(0.3\text{ cm})} \\ =40\pi \\ =40*(22)/(7) \\ \approx125.71 \end{gathered}`

Therefore, the velocity ratio of a screw jack is 40π or 125.71.