The projectile precesses about the Z axis at a constant rate of ϕ = 15

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The projectile precesses about the Z axis at a constant rate of ϕ = 15 rad/s when it leaves the barrel of launcher. Determine its spin ψ˙ and the magnitude of its angular momentum HG. The projectile has a mass of 1.5 kg and a radius of gyration about its axis of symmetry ( z axis) and about its transverse axes (x & y axes) as kz = 65 mm and kx = ky = 125 mm, respectively. Had to make you try one.

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(3 pts.) The projectile precesses about the $Z$ axis at a constant rate of $ϕ = 15 \frac{r a d}{s}$ when it leaves the barrel of launcher. Determine its spin $\dot{ψ}$ and the magnitude of its angular momentum $H_{G}$ . The projectile has a mass of $1.5 k g$ and a radius of gyration about its axis of symmetry ( $z$ axis) and about its transverse axes ( $x$ & y axes) as $k_{2} = 65 m m$ and $k_{x} = k_{y} = 125 m m$ , respectively. Had to make you try one.