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?

by | Jan 25 | Physics WAEC | 0 comments

A. 2πr²/P
B. 2πr/P
C. 2πr/p
D. P²/πr

Correct Answer: Option B

B. 2πr/P

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