projectile question (1 Viewer)

[jskeza]

I know how to do this but I don't understand why the roots of the equation gt^2 - 2Vtsinθ + 2h = 0 give t1 + t1 and t1t2. Can someone please explain why it works. Thanks

 

[Trebla]

When you solve that quadratic equation in terms of t, you are effectively finding the times where y=h

 

[jskeza]

When you solve that quadratic equation in terms of t, you are effectively finding the times where y=h

thanks! i was thinking h was max height, now i took a another look at the diagram it makes sense. it was a really stupid question after i saw it lol