Two spanners X and Y of lengths 15cm and 20cm respectively are used in turn...
PHYSICS
WAEC 1996
Two spanners X and Y of lengths 15cm and 20cm respectively are used in turn to give a screw of pitch 2mm one complete rotation. If Rx and Ry are the respective velocity ratios of the spanners then the ratio Rx : Ry is
- A. 1 : 50
- B. 3 : 20
- C. 3:4
- D. 4:3
Correct Answer: C. 3:4
Explanation
Rx = 15/0.2 = 75 Ry = 20/0.2 = 100 Rx : Ry = 75 : 100 = 3 : 4
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