JAMB - Physics (1994 - No. 9)
Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm
\(\frac{1}{140}\)\(\pi\)
14\(\pi\)
70\(\pi\)
140\(\pi\)
Giải thích
V.R = \(\frac{2\pi L}{p}\)
= \(\frac{2 \times \pi \times 2}{0.3}\)
V.R = 140\(\pi\)
= \(\frac{2 \times \pi \times 2}{0.3}\)
V.R = 140\(\pi\)