At a given moment, a plane passes directly above a radar station at an altitude of 6 km and the plane's speed is 900 km/h. let theta be the angle that the line through the radar station and the plane makes with the horizontal. how fast is theta changing 12 min after the plane passes over the radar station?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.