Why is this not plotting ? I would like to plot with units .....

[johnmassucci]

vel = Quantity[3000, “Feet”/“Seconds”];
grav = Quantity[1, “StandardAccelerationOfGravity”];
Plot[vel*t + 1/2 (-grav) t^2, {t, Quantity[0, “Seconds”],
Quantity[3, “Seconds”]}, PlotTheme → “Web”,
FrameLabel → Automatic, Filling → Bottom]

Why is the above not plotting ?

Regards,

John

[nma (Nasser M. Abbasi)]

Mathematica 10.3.1, windows 7, 64 bit:

vel = Quantity[3000, "Feet"/"Seconds"];
grav = Quantity[1,"StandardAccelerationOfGravity"];
Plot[vel*t + 1/2 (-grav) t^2, {t, Quantity[0, "Seconds"], 
  Quantity[3, "Seconds"]}, PlotTheme -> "Web", FrameLabel -> Automatic, Filling -> Bottom]