2D Kinematics (Projectile Motion)

Projectile Motion example problems, including solving for an intermediate value to find the solution you care about.

[nit]

please make a video and go more in depth on how to cross multiply. i would also like to know how you got -22.773, because i got positive.

[baltimoredude]

I think you got the math wrong in the 2nd problem.


Also, you made it more complicated.


Vfy^2 = Viy^2 + 2 (a) ( delta(y))
Vfy^2 = 0, so the eqn is : 0^2 = Viy^2 + 2 (-9.8) (2.4)
Viy^2 = 47.04 and Viy = 6.85


tan 40 = 6.85 / Vix or Vix = 8.17


Vi = sqrt(Vix^2 + Viy^2) and approximately equals 10.7 m/s