Initial velocity for two projectiles

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Fu-Kwun Hwang

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1 Initial velocity for two projectiles

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on: October 02, 2009, 10:49:08 pm » posted from:Taipei,T\'ai-pei,Taiwan

The following picture shows trajectory for two projectiles.

If Vx, Vy and Vx,Vy are velocity for two projectiles.
Which of the following one is correct?
A. Vx=2Vx, Vy=2Vy
B. Vx=Vx, Vy=2Vy
C. Vx= $\sqrt{2}$ Vx, Vy= $\sqrt{2}$ Vy
D. Vx=Vx, Vy= $\sqrt{2}$ Vy

projectiles2.gif (7.37 KB, 632x349 - viewed 640 times.)
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