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I came across this question in my text book, and there isnt an answer for it in the back, so I would just like to check if I have my head around it.

The question is:

2 projectiles are launched at the same angle. Projectile 1 reaches a max height of twice that of the projectile 2. What is the ration of the initial speeds?

I said that they where in the ratio 4:1, as one of the formulas is: y=yo +voyt -0.5gt^2

and because the height is doubled, the time taken must also be doubled?

am I correct in saying this?

Thanks

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# Projectile Motion comparing height and initial velocity

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