Assertion: glider's lift | /r/HasProperty | proportional
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Source sentences:
text: As lift and drag are both proportional to the coefficient of Lift and Drag respectively multiplied by the same factor (1/2 ρ air v2S), the L/D ratio can be simplified to the Coefficient of lift divided by the coefficient of drag or Cl/Cd, and since both are proportional to the airspeed, the ratio of L/D or Cl/Cd is then typically plotted against angle of attack.