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

  • 1 : 50
  • 3 : 20
  • 3:4 checkmark
  • 4:3
  • 20:3

The correct answer is: C

Explanation

Rx = 15/0.2 = 75
Ry = 20/0.2 = 100
Rx : Ry = 75 : 100 = 3 : 4
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