6. A jet plane flying at a constant speed v at an altitude h = 10 km is being tracked by radar located at O directly below the line of flight. If the angle is decreasing at the rate of 0.02 rad/s when = 60°, determine the value of at this instant and the magnitude of the velocity v of the plane. h ---

6. A jet plane flying at a constant speed v at an altitude h = 10 km is being tracked by radar located at O directly below the line of flight. If the angle is decreasing at the rate of 0.02 rad/s when = 60°, determine the value of at this instant and the magnitude of the velocity v of the plane. h ---