Question

(3B1) [4pt] A transient person stands on a mountain top height 500m, shoots a bullet with initial speed 200m/s, angle between the bullet initial velocity and horizontal direction is 60 deg. The bullet hits an innocent lamb eating grass at foothill height 100m, after how many second the bullet hit the lamb? (3B2) [2pt] what is the horizontal distance between the lamb and the transient person? (3C1) [2pt] A particle execute 3d motion, position as function of time is: x(t)=2[m]cos(2t); y(t)=3[m]sin(2t); z(t)=7t; find speed of particle at t=4s, v(4)=? (3C2) [4pt] angle $\theta(t) = \vec{v}(t) \cdot \vec{a}(t)$ between velocity vector and acceleration vector at the moment t=2s?

          (3B1) [4pt] A transient person stands on a mountain top height 500m, shoots a bullet with initial speed 200m/s, angle between the bullet initial velocity and horizontal direction is 60 deg. The bullet hits an innocent lamb eating grass at foothill height 100m, after how many second the bullet hit the lamb?
(3B2) [2pt] what is the horizontal distance between the lamb and the transient person?
(3C1) [2pt] A particle execute 3d motion, position as function of time is: x(t)=2[m]cos(2t); y(t)=3[m]sin(2t); z(t)=7t; find speed of particle at t=4s, v(4)=?
(3C2) [4pt] angle $\theta(t) = \vec{v}(t) \cdot \vec{a}(t)$ between velocity vector and acceleration vector at the moment t=2s?

(3B1) [4pt] A transient person stands on a mountain top height 500m, shoots a bullet with initial speed 200m/s, angle between the bullet initial velocity and horizontal direction is 60 deg. The bullet hits an innocent lamb eating grass at foothill height 100m, after how many second the bullet hit the lamb?
(3B2) [2pt] what is the horizontal distance between the lamb and the transient person?
(3C1) [2pt] A particle execute 3d motion, position as function of time is: x(t)=2[m]cos(2t); y(t)=3[m]sin(2t); z(t)=7t; find speed of particle at t=4s, v(4)=?
(3C2) [4pt] angle θ(t) = v⃗(t) ·a⃗(t) between velocity vector and acceleration vector at the moment t=2s?

Added by Willie G.

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