Question on: WAEC Physics - 2014
A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression
A
\(\frac{2 \pi r^2}{P}\)
B
\(\frac{2 \pi r}{P}\)
C
\(\frac{2 \pi}{rp}\)
D
\(\frac{P}{2 \pi r}\)
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Correct Option: B
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