A rocket is tracked by radar from its launching point A. When it is 10 seconds into its flight, the following radar measurements are recorded: r = 2450 m, r˙ = 412 m/s, r¨ = 3.60 m/s2, θ = 25∘, θ˙ = 0.0540 rad/s, θ¨ = −0.0281 rad/s2. For this instant determine the angle β between the horizontal and the direction of the trajectory of the rocket and find the magnitudes of its velocity v and acceleration a. Answers: β = v = m/s a = m/s2